| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,216 | $22,767 |
| 2016 | $37,944 | $24,743 |
| 2017 | $39,836 | $23,828 |
| 2018 | $39,836 | $24,190 |
| 2019 | $43,346 | $23,821 |
| 2020 | $45,020 | $25,495 |
| 2021* | $47,167 | $25,883 |
| 2022* | $49,417 | $26,276 |
| 2023* | $51,775 | $26,675 |
| 2024* | $54,244 | $27,081 |
| 2025* | $56,832 | $27,492 |