| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $57,317 | $50,874 |
| 2016 | $56,643 | $47,621 |
| 2017 | $50,353 | $44,128 |
| 2018 | $50,353 | $39,657 |
| 2019 | $43,195 | $33,106 |
| 2020 | $42,286 | $32,197 |
| 2021* | $41,398 | $29,837 |
| 2022* | $40,529 | $27,650 |
| 2023* | $39,678 | $25,623 |
| 2024* | $38,844 | $23,745 |
| 2025* | $38,029 | $22,004 |