From 1957 to 1962, ten nuclear charges were exploded at Kapustin Yar, Western Kazakhstan.[1] As of January 2001, Russia was leasing the site from Kazakhstan in exchange for annual in-kind payments of military equipment and training, worth $25.5 million.[2]

Sources:
[1] Smantay Tleubergenov, Poligony Kazakhstana (Almaty: Gylym, 1997), pp. 433-436, 480-481. {Entered 11/6/2000 KB} 
[2] "Novosti iz stran SNG," ITAR-TASS, 12 January 2001. {Updated 6/18/2001 NA}