| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $38,930 | $22,711 |
| 2016 | $38,660 | $21,019 |
| 2017 | $40,730 | $22,256 |
| 2018 | $40,730 | $22,846 |
| 2019 | $42,406 | $20,951 |
| 2020 | $43,286 | $21,831 |
| 2021* | $44,186 | $22,410 |
| 2022* | $45,105 | $23,003 |
| 2023* | $46,044 | $23,613 |
| 2024* | $47,001 | $24,239 |
| 2025* | $47,979 | $24,881 |