| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,326 | $25,161 |
| 2016 | $31,758 | $26,764 |
| 2017 | $32,124 | $27,377 |
| 2018 | $32,124 | $27,097 |
| 2019 | $33,893 | $28,662 |
| 2020 | $34,519 | $29,288 |
| 2021* | $34,995 | $29,959 |
| 2022* | $35,478 | $30,645 |
| 2023* | $35,968 | $31,347 |
| 2024* | $36,464 | $32,064 |
| 2025* | $36,967 | $32,799 |