| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,536 | $14,328 |
| 2016 | $19,536 | $14,324 |
| 2017 | $19,824 | $14,415 |
| 2018 | $19,824 | $14,071 |
| 2019 | $21,066 | $14,619 |
| 2020 | $21,326 | $14,879 |
| 2021* | $21,588 | $14,974 |
| 2022* | $21,854 | $15,070 |
| 2023* | $22,123 | $15,167 |
| 2024* | $22,395 | $15,264 |
| 2025* | $22,670 | $15,361 |