| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,937 | $27,657 |
| 2016 | $35,724 | $28,786 |
| 2017 | $37,160 | $28,146 |
| 2018 | $37,160 | $30,656 |
| 2019 | $29,044 | $14,774 |
| 2020 | $29,949 | $15,679 |
| 2021* | $30,623 | $16,319 |
| 2022* | $31,312 | $16,985 |
| 2023* | $32,016 | $17,677 |
| 2024* | $32,737 | $18,399 |
| 2025* | $33,473 | $19,149 |