| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,189 | $20,280 |
| 2016 | $28,332 | $23,034 |
| 2017 | $28,867 | $23,462 |
| 2018 | $28,867 | $23,199 |
| 2019 | $29,906 | $23,629 |
| 2020 | $29,321 | $23,044 |
| 2021* | $29,875 | $23,470 |
| 2022* | $30,440 | $23,905 |
| 2023* | $31,015 | $24,347 |
| 2024* | $31,601 | $24,797 |
| 2025* | $32,199 | $25,256 |