| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,150 | $16,201 |
| 2016 | $22,774 | $16,269 |
| 2017 | $23,673 | $16,804 |
| 2018 | $23,673 | $14,423 |
| 2019 | $23,381 | $14,927 |
| 2020 | $24,034 | $15,580 |
| 2021* | $24,705 | $16,093 |
| 2022* | $25,394 | $16,622 |
| 2023* | $26,102 | $17,169 |
| 2024* | $26,831 | $17,734 |
| 2025* | $27,579 | $18,317 |
