| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,566 | $17,694 |
| 2016 | $28,794 | $20,955 |
| 2017 | $29,293 | $21,259 |
| 2018 | $29,293 | $19,691 |
| 2019 | $29,954 | $21,074 |
| 2020 | $30,628 | $21,748 |
| 2021* | $31,317 | $22,444 |
| 2022* | $32,022 | $23,162 |
| 2023* | $32,742 | $23,903 |
| 2024* | $33,479 | $24,668 |
| 2025* | $34,232 | $25,458 |