| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,210 | $17,790 |
| 2016 | $22,600 | $17,770 |
| 2017 | $24,677 | $16,007 |
| 2018 | $24,677 | $20,685 |
| 2019 | $25,519 | $21,106 |
| 2020 | $24,686 | $20,273 |
| 2021* | $25,120 | $20,251 |
| 2022* | $25,563 | $20,228 |
| 2023* | $26,012 | $20,206 |
| 2024* | $26,470 | $20,184 |
| 2025* | $26,936 | $20,162 |
