| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,590 | $22,330 |
| 2016 | $43,872 | $24,245 |
| 2017 | $44,972 | $24,238 |
| 2018 | $44,972 | $23,042 |
| 2019 | $47,541 | $24,947 |
| 2020 | $48,857 | $26,263 |
| 2021* | $50,210 | $27,650 |
| 2022* | $51,601 | $29,110 |
| 2023* | $53,031 | $30,647 |
| 2024* | $54,499 | $32,265 |
| 2025* | $56,009 | $33,968 |