| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,322 | $15,554 |
| 2016 | $20,769 | $16,262 |
| 2017 | $21,215 | $15,904 |
| 2018 | $21,215 | $16,128 |
| 2019 | $21,731 | $16,092 |
| 2020 | $24,651 | $19,012 |
| 2021* | $25,193 | $19,280 |
| 2022* | $25,748 | $19,552 |
| 2023* | $26,314 | $19,828 |
| 2024* | $26,893 | $20,107 |
| 2025* | $27,485 | $20,391 |
