| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,531 | $15,926 |
| 2016 | $24,772 | $15,737 |
| 2017 | $25,602 | $16,793 |
| 2018 | $25,602 | $16,363 |
| 2019 | $26,232 | $16,291 |
| 2020 | $26,334 | $16,393 |
| 2021* | $26,592 | $16,321 |
| 2022* | $26,853 | $16,249 |
| 2023* | $27,116 | $16,178 |
| 2024* | $27,382 | $16,106 |
| 2025* | $27,650 | $16,036 |