| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,030 | $16,976 |
| 2016 | $27,838 | $16,282 |
| 2017 | $28,743 | $17,074 |
| 2018 | $28,743 | $17,462 |
| 2019 | $30,022 | $18,102 |
| 2020 | $30,400 | $18,480 |
| 2021* | $31,309 | $18,899 |
| 2022* | $32,245 | $19,329 |
| 2023* | $33,209 | $19,767 |
| 2024* | $34,202 | $20,216 |
| 2025* | $35,225 | $20,675 |