| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,504 | $19,299 |
| 2016 | $27,234 | $21,078 |
| 2017 | $28,200 | $22,217 |
| 2018 | $28,200 | $21,832 |
| 2019 | $29,814 | $22,562 |
| 2020 | $29,772 | $22,520 |
| 2021* | $30,829 | $23,272 |
| 2022* | $31,923 | $24,049 |
| 2023* | $33,057 | $24,853 |
| 2024* | $34,230 | $25,683 |
| 2025* | $35,445 | $26,541 |
