| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,256 | $26,261 |
| 2016 | $33,606 | $25,651 |
| 2017 | $33,734 | $25,883 |
| 2018 | $33,734 | $24,822 |
| 2019 | $38,294 | $29,207 |
| 2020 | $39,072 | $29,985 |
| 2021* | $39,482 | $30,255 |
| 2022* | $39,897 | $30,527 |
| 2023* | $40,316 | $30,802 |
| 2024* | $40,739 | $31,079 |
| 2025* | $41,167 | $31,359 |
