| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,433 | $23,933 |
| 2016 | $37,783 | $23,345 |
| 2017 | $38,688 | $23,055 |
| 2018 | $38,688 | $22,044 |
| 2019 | $42,306 | $23,979 |
| 2020 | $42,040 | $23,713 |
| 2021* | $43,049 | $23,419 |
| 2022* | $44,082 | $23,129 |
| 2023* | $45,140 | $22,842 |
| 2024* | $46,223 | $22,559 |
| 2025* | $47,333 | $22,279 |