| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | N/A | N/A |
| 2016 | $29,403 | $24,243 |
| 2017 | $26,534 | $22,277 |
| 2018 | $26,534 | $20,873 |
| 2019 | $27,899 | $23,824 |
| 2020 | $28,587 | $24,512 |
| 2021* | $28,939 | $24,093 |
| 2022* | $29,295 | $23,681 |
| 2023* | $29,655 | $23,276 |
| 2024* | $30,020 | $22,878 |
| 2025* | $30,389 | $22,487 |