From the first Soyuz to the launch vehicles used today, how many launches have been deemed successful?
As of Sep 24 2013:
The TsSKB Progress site gives the official numbers for all of the R-7 family.
Now, counting only rockets designated Soyuz, that is:
Soyuz-ST, Soyuz-2, Soyuz-U, Soyuz-FG, Soyuz-U2, Soyuz-M, Soyuz-L, Soyuz.
And not counting Vostok, Molnia, Voskhod, Sputnik and R7 MBR, we have
total: 5+23+778+44+70+8+3+32 = 963
failure: 1+21+2 = 24
success: 963 - 24 = 939