| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,430 | $17,444 |
| 2016 | $28,662 | $18,102 |
| 2017 | $29,574 | $19,060 |
| 2018 | $29,574 | $19,278 |
| 2019 | $32,462 | $21,764 |
| 2020 | $32,880 | $22,182 |
| 2021* | $33,926 | $23,018 |
| 2022* | $35,004 | $23,886 |
| 2023* | $36,118 | $24,787 |
| 2024* | $37,266 | $25,721 |
| 2025* | $38,451 | $26,691 |