In early 1987 a CIA report estimated that, from 1979 to 1986, the Soviet military spent 18 billion rubles on the war in Afghanistan (not counting other costs incurred to the Soviet state such as economic and military aid to the DRA). The CIA noted that this was the equivalent of US$50 billion ($115 billion in 2019 USD). The report credited the relatively low cost to the small size of the Soviet deployment and the fact that the supply lines to Afghanistan were very short (in some cases, easier and cheaper than internal USSR lines). Military aid to the DRA's armed forces totaled 9.124 billion rubles from 1980 to 1989 (peaking at 3.972 billion rubles in 1989). Financial and economic aid were also significant; by 1990, 75% of the Afghan state's income came from Soviet aid.