| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,770 | $21,277 |
| 2016 | $32,570 | $20,893 |
| 2017 | $34,915 | $22,733 |
| 2018 | $34,915 | $21,910 |
| 2019 | $38,255 | $23,860 |
| 2020 | $37,345 | $22,950 |
| 2021* | $38,286 | $22,537 |
| 2022* | $39,251 | $22,131 |
| 2023* | $40,240 | $21,733 |
| 2024* | $41,254 | $21,342 |
| 2025* | $42,294 | $20,958 |