| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,946 | $15,725 |
| 2016 | $20,460 | $15,998 |
| 2017 | $21,746 | $17,542 |
| 2018 | $21,746 | $17,332 |
| 2019 | $23,000 | $18,106 |
| 2020 | $22,996 | $18,102 |
| 2021* | $23,589 | $18,417 |
| 2022* | $24,198 | $18,737 |
| 2023* | $24,822 | $19,063 |
| 2024* | $25,463 | $19,395 |
| 2025* | $26,120 | $19,733 |
