The MSISE-90 model is available in digital form at http://www.braeunig.us/space/atmos.htm. A copy of the table is reproduced below. Note the dependence on solar activity, which imparts particlesto the upper atmosphere.
$$
\begin{matrix}
Altitude, km& Low Solar Activity&&&& Mean Solar Activity&&&& Extremely High Solar Activity&&&\\ &Temp., K& Density, kg/m3& Pressure, Pa& Mol. Wt., g/mol& Temp.& Density& Pressure& Mol. Wt.& Temp.& Density& Pressure& Mol. Wt.\\
0& 300.2511& 1.17E+00& 1.01E+05& 28.9502& 300.2511& 1.17E+00& 1.01E+05& 28.9502& 300.2511& 1.16E+00& 9.98E+04& 28.9502\\
20& 206.2085& 9.48E-02& 5.62E+03& 28.9502& 206.2085& 9.49E-02& 5.62E+03& 28.9502& 206.2085& 9.41E-02& 5.57E+03& 28.9502\\
40& 257.6979& 4.07E-03& 3.01E+02& 28.9502& 257.6979& 4.07E-03& 3.02E+02& 28.9502& 257.6979& 4.04E-03& 2.99E+02& 28.9502\\
60& 244.1212& 3.31E-04& 2.32E+01& 28.9502& 244.1212& 3.31E-04& 2.32E+01& 28.9502& 244.1212& 3.28E-04& 2.30E+01& 28.9502\\
80& 203.1065& 1.69E-05& 9.81E-01& 29.1353& 196.3636& 1.68E-05& 9.45E-01& 29.0175& 172.2146& 1.68E-05& 8.42E-01& 28.529\\
100& 168.7219& 5.77E-07& 2.89E-02& 28.0036& 184.016& 5.08E-07& 2.81E-02& 27.7137& 297.3338& 2.78E-07& 2.63E-02& 26.1997\\
120& 356.8669& 1.70E-08& 1.92E-03& 26.3948& 374.9715& 1.80E-08& 2.17E-03& 25.8745& 430.8385& 2.34E-08& 3.55E-03& 23.6456\\
140& 545.8594& 2.96E-09& 5.37E-04& 25.0665& 635.5703& 3.26E-09& 7.03E-04& 24.5349& 875.9174& 4.93E-09& 1.61E-03& 22.3209\\
160& 630.0652& 9.65E-10& 2.13E-04& 23.7884& 787.5532& 1.18E-09& 3.31E-04& 23.4225& 1,143.54 &2.23E-09& 9.90E-04& 21.4577\\
180& 667.8662& 3.90E-10& 9.62E-05& 22.5037& 877.6729& 5.51E-10& 1.80E-04& 22.4106&1,314.34 &1.28E-09& 6.76E-04& 20.7706\\
200& 684.9187& 1.75E-10& 4.70E-05& 21.2516& 931.2806& 2.91E-10& 1.05E-04& 21.4734& 1,423.65& 8.28E-10 & 4.86E-04& 20.1836\\
220& 692.6487& 8.47E-11& 2.43E-05& 20.0935& 963.2701& 1.66E-10& 6.44E-05& 20.6108& 1,493.79& 5.69E-10& 3.60E-04& 19.6664\\
240& 696.1697& 4.31E-11& 1.31E-05& 19.0789& 982.4191& 9.91E-11& 4.09E-05& 19.8292& 1,538.92& 4.08E-10& 2.72E-04& 19.2046\\
260& 697.7811& 2.30E-11& 7.31E-06& 18.23& 993.9173& 6.16E-11& 2.66E-05& 19.1337& 1,568.03& 3.00E-10&
2.08E-04& 18.7901\\
280& 698.522& 1.27E-11& 4.20E-06& 17.5402& 1,000.84& 3.94E-11& 1.77E-05& 18.5256& 1,586.86& 2.25E-10&
1.61E-04& 18.4178\\
300& 698.8644& 7.22E-12& 2.47E-06& 16.983& 1,005.03& 2.58E-11& 1.20E-05& 18.0015& 1,599.07& 1.71E-10&
1.26E-04& 18.0839\\
320& 699.0233& 4.21E-12& 1.48E-06& 16.5214& 1,007.56& 1.72E-11& 8.20E-06& 17.5537& 1,607.02& 1.32E-10&
9.93E-05& 17.7852\\
340& 699.0973& 2.50E-12& 9.01E-07& 16.1147& 1,009.10& 1.16E-11& 5.69E-06& 17.1721& 1,612.19& 1.03E-10&
7.86E-05& 17.5186\\
360& 699.132& 1.51E-12& 5.57E-07& 15.7219& 1,010.04& 7.99E-12& 3.98E-06& 16.8449& 1,615.58& 8.05E-11&
6.26E-05& 17.2812\\
380& 699.1483& 9.20E-13& 3.50E-07& 15.3028& 1,010.62& 5.55E-12& 2.81E-06& 16.5597& 1,617.79& 6.35E-11&
5.01E-05& 17.0699\\
400& 699.1561& 5.68E-13& 2.23E-07& 14.8185& 1,010.97& 3.89E-12& 2.01E-06& 16.3044& 1,619.25& 5.04E-11&
4.02E-05& 16.8818\\
420& 699.1597& 3.54E-13& 1.45E-07& 14.2332& 1,011.19& 2.75E-12& 1.44E-06& 16.0669& 1,620.21& 4.02E-11&
3.25E-05& 16.7142\\
440& 699.1615& 2.23E-13& 9.61E-08& 13.5181& 1,011.32& 1.96E-12& 1.04E-06& 15.836& 1,620.84& 3.23E-11&
2.63E-05& 16.5643\\
460& 699.1623& 1.42E-13& 6.54E-08& 12.6581& 1,011.40& 1.40E-12& 7.55E-07& 15.6008& 1,621.26& 2.60E-11&
2.13E-05& 16.4297\\
480& 699.1627& 9.20E-14& 4.59E-08& 11.6594& 1,011.45& 1.01E-12& 5.53E-07& 15.3508& 1,621.54& 2.10E-11&
1.73E-05& 16.3079\\
500& 699.1629& 6.03E-14& 3.32E-08& 10.5547& 1,011.48& 7.30E-13& 4.07E-07& 15.076& 1,621.72& 1.70E-11&
1.42E-05& 16.1967\\
520& 699.163& 4.03E-14& 2.49E-08& 9.4006& 1,011.50& 5.31E-13& 3.03E-07& 14.7669& 1,621.84& 1.38E-11&
1.16E-05& 16.094\\
540& 699.163& 2.75E-14& 1.94E-08& 8.2657& 1,011.52& 3.88E-13& 2.27E-07& 14.4148& 1,621.93& 1.13E-11&
9.50E-06& 15.998\\
560& 699.1631& 1.93E-14& 1.55E-08& 7.2141& 1,011.52& 2.85E-13& 1.71E-07& 14.0125& 1,621.98& 9.21E-12&
7.81E-06& 15.9067\\
580& 699.1631& 1.39E-14& 1.28E-08& 6.2904& 1,011.53& 2.11E-13& 1.31E-07& 13.5547& 1,622.02& 7.55E-12&
6.44E-06& 15.8187\\
600& 699.1631& 1.03E-14& 1.09E-08& 5.5149& 1,011.53& 1.56E-13& 1.01E-07& 13.0389& 1,622.04& 6.20E-12&
5.31E-06& 15.7321\\
620& 699.1631& 7.90E-15& 9.40E-09& 4.8864& 1,011.53& 1.17E-13& 7.89E-08& 12.4665& 1,622.06& 5.10E-12&
4.40E-06& 15.6457\\
640& 699.1631& 6.24E-15& 8.27E-09& 4.3891& 1,011.54& 8.79E-14& 6.24E-08& 11.8428& 1,622.07& 4.20E-12&
3.65E-06& 15.5578\\
660& 699.1631& 5.06E-15& 7.36E-09& 4.0012& 1,011.54& 6.65E-14& 5.01E-08& 11.1779& 1,622.08& 3.47E-12&
3.03E-06& 15.4672\\
680& 699.1631& 4.21E-15& 6.62E-09& 3.6999& 1,011.54& 5.08E-14& 4.07E-08& 10.4854& 1,622.08& 2.88E-12&
2.52E-06& 15.3725\\
700& 699.1631& 3.58E-15& 6.00E-09& 3.4648& 1,011.54& 3.91E-14& 3.36E-08& 9.7818& 1,622.09& 2.38E-12&
2.11E-06& 15.2723\\
720& 699.1631& 3.09E-15& 5.48E-09& 3.2789& 1,011.54& 3.04E-14& 2.82E-08& 9.0847& 1,622.09& 1.98E-12&
1.76E-06& 15.1653\\
740& 699.1631& 2.70E-15& 5.02E-09& 3.1289& 1,011.54& 2.39E-14& 2.39E-08& 8.4111& 1,622.09& 1.65E-12&
1.48E-06& 15.0503\\
760& 699.1631& 2.39E-15& 4.63E-09& 3.0049& 1,011.54& 1.90E-14& 2.06E-08& 7.7753& 1,622.09& 1.37E-12&
1.24E-06& 14.926\\
780& 699.1631& 2.13E-15& 4.28E-09& 2.8996& 1,011.54& 1.53E-14& 1.79E-08& 7.1884& 1,622.09& 1.15E-12&
1.05E-06& 14.7912\\
800& 699.1631& 1.91E-15& 3.96E-09& 2.8075& 1,011.54& 1.25E-14& 1.58E-08& 6.6572& 1,622.09& 9.59E-13&
8.84E-07& 14.6447\\
820& 699.1631& 1.73E-15& 3.68E-09& 2.7249& 1,011.54& 1.03E-14& 1.40E-08& 6.1849& 1,622.09& 8.04E-13&
7.48E-07& 14.4854\\
840& 699.1631& 1.56E-15& 3.43E-09& 2.6492& 1,011.54& 8.64E-15& 1.26E-08& 5.7711& 1,622.09& 6.74E-13&
6.36E-07& 14.3123\\
860& 699.1631& 1.42E-15& 3.21E-09& 2.5784& 1,011.54& 7.32E-15& 1.14E-08& 5.4132& 1,622.09& 5.67E-13&
5.42E-07& 14.1244\\
880& 699.1631& 1.30E-15& 3.00E-09& 2.5113& 1,011.54& 6.28E-15& 1.04E-08& 5.1066& 1,622.09& 4.77E-13&
4.63E-07& 13.921\\
900& 699.1631& 1.18E-15& 2.81E-09& 2.447& 1,011.54& 5.46E-15& 9.47E-09& 4.846& 1,622.09& 4.03E-13&
3.97E-07& 13.7015\\
\end{matrix}
$$