| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,538 | $21,750 |
| 2016 | $28,012 | $21,287 |
| 2017 | $31,400 | $25,040 |
| 2018 | $31,400 | $26,210 |
| 2019 | $31,743 | $25,591 |
| 2020 | $31,609 | $25,457 |
| 2021* | $31,954 | $25,325 |
| 2022* | $32,302 | $25,193 |
| 2023* | $32,654 | $25,062 |
| 2024* | $33,010 | $24,932 |
| 2025* | $33,370 | $24,802 |
