| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,349 | $16,237 |
| 2016 | $24,309 | $16,749 |
| 2017 | $25,306 | $17,335 |
| 2018 | $25,306 | $16,101 |
| 2019 | $26,830 | $16,757 |
| 2020 | $25,476 | $15,403 |
| 2021* | $26,521 | $15,888 |
| 2022* | $27,608 | $16,389 |
| 2023* | $28,740 | $16,905 |
| 2024* | $29,918 | $17,437 |
| 2025* | $31,145 | $17,987 |