| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $51,838 | $30,054 |
| 2016 | $53,308 | $30,024 |
| 2017 | $54,800 | $29,142 |
| 2018 | $54,800 | $27,816 |
| 2019 | $58,258 | $28,214 |
| 2020 | $61,160 | $31,116 |
| 2021* | $62,897 | $31,085 |
| 2022* | $64,683 | $31,054 |
| 2023* | $66,520 | $31,023 |
| 2024* | $68,409 | $30,992 |
| 2025* | $70,352 | $30,961 |