| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,168 | $27,540 |
| 2016 | $33,687 | $28,022 |
| 2017 | $34,182 | $28,627 |
| 2018 | $34,182 | $28,408 |
| 2019 | $33,114 | $26,764 |
| 2020 | $40,027 | $33,677 |
| 2021* | $40,615 | $34,266 |
| 2022* | $41,212 | $34,866 |
| 2023* | $41,818 | $35,476 |
| 2024* | $42,433 | $36,097 |
| 2025* | $43,057 | $36,729 |