| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,788 | $27,199 |
| 2016 | $36,712 | $30,023 |
| 2017 | $34,948 | $28,838 |
| 2018 | $34,948 | $32,102 |
| 2019 | $36,768 | $29,976 |
| 2020 | $37,648 | $30,856 |
| 2021* | $38,548 | $31,763 |
| 2022* | $39,469 | $32,697 |
| 2023* | $40,412 | $33,658 |
| 2024* | $41,378 | $34,648 |
| 2025* | $42,367 | $35,666 |