| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,480 | $16,532 |
| 2016 | $22,719 | $17,340 |
| 2017 | $23,699 | $18,255 |
| 2018 | $23,699 | $17,607 |
| 2019 | $24,488 | $18,006 |
| 2020 | $24,524 | $18,042 |
| 2021* | $25,341 | $18,452 |
| 2022* | $26,184 | $18,870 |
| 2023* | $27,056 | $19,299 |
| 2024* | $27,957 | $19,737 |
| 2025* | $28,888 | $20,185 |
