| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,074 | $16,153 |
| 2016 | $20,607 | $16,447 |
| 2017 | $21,324 | $16,704 |
| 2018 | $21,324 | $16,250 |
| 2019 | $23,075 | $17,908 |
| 2020 | $23,075 | $17,908 |
| 2021* | $23,689 | $18,187 |
| 2022* | $24,319 | $18,471 |
| 2023* | $24,966 | $18,759 |
| 2024* | $25,630 | $19,052 |
| 2025* | $26,312 | $19,349 |