| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,486 | $10,409 |
| 2016 | $18,956 | $10,558 |
| 2017 | $19,807 | $11,383 |
| 2018 | $19,807 | $11,381 |
| 2019 | $21,032 | $12,320 |
| 2020 | $22,086 | $13,374 |
| 2021* | $23,078 | $14,419 |
| 2022* | $24,114 | $15,545 |
| 2023* | $25,197 | $16,759 |
| 2024* | $26,328 | $18,067 |
| 2025* | $27,510 | $19,479 |