| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $56,481 | $38,332 |
| 2016 | $58,434 | $39,027 |
| 2017 | $59,607 | $39,123 |
| 2018 | $59,607 | $37,169 |
| 2019 | $63,921 | $38,327 |
| 2020 | $65,970 | $40,376 |
| 2021* | $68,088 | $41,107 |
| 2022* | $70,273 | $41,851 |
| 2023* | $72,529 | $42,608 |
| 2024* | $74,857 | $43,380 |
| 2025* | $77,260 | $44,165 |