| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $39,185 | $20,386 |
| 2016 | $40,334 | $22,363 |
| 2017 | $42,550 | $24,110 |
| 2018 | $42,550 | $24,273 |
| 2019 | $44,374 | $23,059 |
| 2020 | $45,616 | $24,301 |
| 2021* | $46,953 | $25,611 |
| 2022* | $48,328 | $26,991 |
| 2023* | $49,744 | $28,446 |
| 2024* | $51,202 | $29,979 |
| 2025* | $52,702 | $31,595 |