| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,498 | $12,095 |
| 2016 | $17,545 | $12,110 |
| 2017 | $22,015 | $16,816 |
| 2018 | $22,015 | $16,745 |
| 2019 | $22,479 | $17,246 |
| 2020 | $23,579 | $18,346 |
| 2021* | $24,077 | $18,895 |
| 2022* | $24,585 | $19,459 |
| 2023* | $25,103 | $20,041 |
| 2024* | $25,633 | $20,641 |
| 2025* | $26,174 | $21,258 |
