| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,798 | $17,372 |
| 2016 | $27,300 | $17,128 |
| 2017 | $28,095 | $18,321 |
| 2018 | $28,095 | $17,171 |
| 2019 | $29,385 | $16,904 |
| 2020 | $29,720 | $17,239 |
| 2021* | $30,276 | $16,998 |
| 2022* | $30,842 | $16,760 |
| 2023* | $31,419 | $16,525 |
| 2024* | $32,006 | $16,294 |
| 2025* | $32,605 | $16,066 |