| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,476 | $21,377 |
| 2016 | $26,862 | $20,827 |
| 2017 | $27,545 | $21,191 |
| 2018 | $27,545 | $21,113 |
| 2019 | $30,442 | $23,614 |
| 2020 | $31,373 | $24,545 |
| 2021* | $32,170 | $24,975 |
| 2022* | $32,987 | $25,412 |
| 2023* | $33,825 | $25,856 |
| 2024* | $34,684 | $26,309 |
| 2025* | $35,565 | $26,769 |