| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,742 | $21,829 |
| 2016 | $32,146 | $22,520 |
| 2017 | $32,732 | $23,050 |
| 2018 | $32,732 | $22,072 |
| 2019 | $33,798 | $23,159 |
| 2020 | $34,834 | $24,195 |
| 2021* | $35,468 | $24,962 |
| 2022* | $36,113 | $25,753 |
| 2023* | $36,771 | $26,570 |
| 2024* | $37,440 | $27,412 |
| 2025* | $38,121 | $28,281 |