Figures in constant (2020) US$ are present according to calendar year, calculated on the assumption that, where financial years do not correspond to calendar years, spending is distributed evenly through the year
| 1970 | 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Казахстан | 227 | 624 | 1 079 | 1 189 | 1 387 | 1 565 | 1 560 | 1 356 | 1 302 | 1 403 | 1 831 | 1 548 | 1 542 | |||
| Киргизия | 54 | 59 | 76 | 74 | 91 | 97 | 107 | 111 | 118 | 119 | 122 | 124 | 131 | 120 | ||
| Азербайджан | 208 | 447 | 1 616 | 3 075 | 3 191 | 3 227 | 3 239 | 3 442 | 2 296 | 1 676 | 1 763 | 1 905 | 2 238 | 2 589 | ||
| Турция | 2 138 | 7 251 | 11 371 | 9 238 | 9 942 | 10 027 | 10 273 | 10 551 | 10 628 | 10 936 | 12 822 | 13 762 | 17 467 | 18 568 | 17 478 | 16 709 |