| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,203 | $19,058 |
| 2016 | $25,403 | $19,994 |
| 2017 | $26,206 | $20,796 |
| 2018 | $26,206 | $20,450 |
| 2019 | $27,476 | $21,335 |
| 2020 | $28,664 | $22,523 |
| 2021* | $29,902 | $23,498 |
| 2022* | $31,194 | $24,516 |
| 2023* | $32,542 | $25,577 |
| 2024* | $33,947 | $26,685 |
| 2025* | $35,414 | $27,840 |