| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,990 | $19,205 |
| 2016 | $28,417 | $20,401 |
| 2017 | $28,861 | $20,908 |
| 2018 | $28,861 | $20,746 |
| 2019 | $30,660 | $20,722 |
| 2020 | $31,326 | $21,388 |
| 2021* | $31,815 | $21,921 |
| 2022* | $32,311 | $22,466 |
| 2023* | $32,815 | $23,026 |
| 2024* | $33,327 | $23,599 |
| 2025* | $33,847 | $24,187 |