| Category | Year; amount spent, $ thousands (% of total) | ||
|---|---|---|---|
| 2013 | 2014 | 2015 | |
| Major therapeutic gain | 0 (0.0) | 3711 (2.3) | 3359 (1.6) |
| Moderate therapeutic gain | 5816 (3.5) | 9350 (5.7) | 9268 (4.5) |
| Little to no therapeutic gain | 159 999 (96.5) | 149 941 (92.0) | 192 644 (93.8) |
| Overall | 165 815 (100.0) | 163 002 (100.0) | 205 271 (100.0) |