| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,501 | $19,172 |
| 2016 | $25,530 | $20,377 |
| 2017 | $26,748 | $20,981 |
| 2018 | $26,748 | $21,528 |
| 2019 | $28,764 | $22,691 |
| 2020 | $29,242 | $23,169 |
| 2021* | $30,470 | $23,855 |
| 2022* | $31,750 | $24,561 |
| 2023* | $33,083 | $25,288 |
| 2024* | $34,473 | $26,036 |
| 2025* | $35,921 | $26,807 |