| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,433 | $14,384 |
| 2016 | $27,374 | $17,403 |
| 2017 | $27,536 | $18,264 |
| 2018 | $27,536 | $18,788 |
| 2019 | $29,291 | $18,307 |
| 2020 | $30,980 | $19,996 |
| 2021* | $32,768 | $20,986 |
| 2022* | $34,658 | $22,025 |
| 2023* | $36,658 | $23,115 |
| 2024* | $38,773 | $24,259 |
| 2025* | $41,010 | $25,460 |