| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,276 | $21,302 |
| 2016 | $28,546 | $21,629 |
| 2017 | $28,774 | $21,767 |
| 2018 | $28,774 | $22,995 |
| 2019 | $34,196 | $27,775 |
| 2020 | $34,196 | $27,775 |
| 2021* | $34,470 | $28,203 |
| 2022* | $34,745 | $28,637 |
| 2023* | $35,023 | $29,078 |
| 2024* | $35,303 | $29,526 |
| 2025* | $35,586 | $29,981 |