| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $57,160 | $34,081 |
| 2016 | $58,059 | $33,697 |
| 2017 | $59,542 | $34,579 |
| 2018 | $59,542 | $33,914 |
| 2019 | $62,584 | $35,272 |
| 2020 | $64,983 | $37,671 |
| 2021* | $66,640 | $38,658 |
| 2022* | $68,339 | $39,671 |
| 2023* | $70,082 | $40,710 |
| 2024* | $71,869 | $41,777 |
| 2025* | $73,702 | $42,871 |