| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,810 | $22,488 |
| 2016 | $32,930 | $24,174 |
| 2017 | $34,680 | $24,362 |
| 2018 | $34,680 | $23,857 |
| 2019 | $38,192 | $24,898 |
| 2020 | $40,010 | $26,716 |
| 2021* | $41,914 | $27,881 |
| 2022* | $43,910 | $29,096 |
| 2023* | $46,000 | $30,365 |
| 2024* | $48,189 | $31,689 |
| 2025* | $50,483 | $33,071 |