| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,890 | $15,165 |
| 2016 | $23,261 | $15,317 |
| 2017 | $23,885 | $15,408 |
| 2018 | $23,885 | $15,726 |
| 2019 | $25,284 | $16,108 |
| 2020 | $25,792 | $16,616 |
| 2021* | $26,310 | $16,958 |
| 2022* | $26,839 | $17,308 |
| 2023* | $27,379 | $17,664 |
| 2024* | $27,929 | $18,028 |
| 2025* | $28,490 | $18,399 |