| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,906 | $20,803 |
| 2016 | $34,862 | $21,621 |
| 2017 | $35,832 | $22,694 |
| 2018 | $35,832 | $21,160 |
| 2019 | $37,778 | $22,839 |
| 2020 | $39,553 | $24,614 |
| 2021* | $40,668 | $25,835 |
| 2022* | $41,815 | $27,116 |
| 2023* | $42,994 | $28,461 |
| 2024* | $44,207 | $29,873 |
| 2025* | $45,454 | $31,355 |