| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $51,317 | $42,624 |
| 2016 | $52,992 | $43,127 |
| 2017 | $53,548 | $42,131 |
| 2018 | $53,548 | $44,376 |
| 2019 | $55,591 | $48,327 |
| 2020 | $56,368 | $49,104 |
| 2021* | $57,157 | $49,895 |
| 2022* | $57,957 | $50,698 |
| 2023* | $58,769 | $51,514 |
| 2024* | $59,592 | $52,343 |
| 2025* | $60,426 | $53,186 |