Thanks to @asdfex for his link to PIXL data in the PDS Geosciences Node.
There's a link to the Mars 2020 Analyst's Notebook tool with the PIXL instrument's data archive.
In the archive I found two MSA files each containing so-called histogram bulk summed spectra (RBS). (page 41 for explanation)
Each of the 4096 channels of the PIXL instrument that counts the re-emitted X-rays from a target, has its own unique 8 eV range and they fit together to cover the total 32.768 keV energy range.
The MSA files contain a header followed by 4096 rows, each with 2 values, one for each detector, representing bulk sum intensity at each channel.
So I looked for all the maximum and minimum values in the rows and with the help of the histogram representation in figure 14 and this energy table for EDS analysis I could find the max. X-ray counts for the different elements.
Sol 140 (275 min.) Sol 167 (468 min.)
Element Top Left Right Top Left Right
Na 5361 - 524 11202 - 3289
Mg 25328 20492 11723 20302 12390 5925
Al 114989 101384 57502 161257 146880 74567
Si 1020232 962744 982363 1682175 1595484 1602593
P 45481 7612 28329 105844 26262 77713
S 383118 365966 329125 297494 269363 229758
Cl 286871 232879 277149 792033 724297 772907
K 67628 57905 52775 117093 97968 88794
Ca 580670 565817 548754 1356676 1328377 1279895
Ca 91180 59264 78017 209764 132983 188783
Ti 90868 77706 71454 293708 272727 257282
V 29756 10342 10416 72306 35880 45220
Cr 38408 19068 20287 37335 10250 9939
Mn 90854 72733 59558 164931 137535 116169
Fe 2940961 2909664 2916046 5212902 5164162 5168024
Fe 441308 416393 428950 777404 732526 759197
Ni 15684 3326 4956 - - -
Cu 14117 3390 2744 21443 4105 4379
Zn 14562 3189 - 19656 2568 -
Notes:
- Every value in the table is the mean of the 2 detector values.
- A value in a "Left" column is the difference between the "Top" value and the next minimum value to the left of the "Top" value in a from the table produced histogram.
- A value in a "Right" column is the difference between the "Top" value and the next minimum value to the right of the "Top" value in a from the table produced histogram.
- Ca and Fe have 2 max. values next to each other.
(See the histogram representation in fig.14)