Vostok
Vostok (Russian: Восток, translated as "East") was a family of rockets derived from the Soviet R-7 Semyorka ICBM and was designed for the human spaceflight program. This family of rockets launched the first artificial satellite (Sputnik 1) and the first crewed spacecraft (Vostok) in human history. It was a subset of the R-7 family of rockets.
Missions: 26
Successes: 16
Partial Failures: 1
Failures: 9
Success Streak: 7
Success Rate: 63.5%