| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,954 | $12,253 |
| 2016 | $21,441 | $12,164 |
| 2017 | $22,883 | $13,113 |
| 2018 | $22,883 | $13,591 |
| 2019 | $24,669 | $16,605 |
| 2020 | $24,760 | $16,696 |
| 2021* | $25,334 | $17,305 |
| 2022* | $25,922 | $17,937 |
| 2023* | $26,524 | $18,592 |
| 2024* | $27,139 | $19,270 |
| 2025* | $27,769 | $19,974 |
