| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,304 | $15,475 |
| 2016 | $21,887 | $16,148 |
| 2017 | $22,618 | $17,009 |
| 2018 | $22,618 | $16,691 |
| 2019 | $23,601 | $16,384 |
| 2020 | $24,056 | $16,839 |
| 2021* | $24,715 | $17,307 |
| 2022* | $25,392 | $17,788 |
| 2023* | $26,088 | $18,283 |
| 2024* | $26,803 | $18,791 |
| 2025* | $27,537 | $19,313 |
