| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,610 | $17,658 |
| 2016 | $29,120 | $19,365 |
| 2017 | $29,370 | $19,251 |
| 2018 | $29,370 | $16,982 |
| 2019 | $30,714 | $21,032 |
| 2020 | $32,020 | $22,338 |
| 2021* | $33,381 | $23,725 |
| 2022* | $34,800 | $25,199 |
| 2023* | $36,279 | $26,763 |
| 2024* | $37,820 | $28,425 |
| 2025* | $39,428 | $30,191 |
