| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,400 | $23,794 |
| 2016 | $44,000 | $23,125 |
| 2017 | $45,300 | $24,185 |
| 2018 | $45,300 | $23,941 |
| 2019 | $49,320 | $22,475 |
| 2020 | $51,410 | $24,565 |
| 2021* | $53,348 | $24,317 |
| 2022* | $55,359 | $24,071 |
| 2023* | $57,446 | $23,828 |
| 2024* | $59,612 | $23,588 |
| 2025* | $61,860 | $23,349 |