| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,718 | $13,275 |
| 2016 | $18,060 | $13,431 |
| 2017 | $18,370 | $13,781 |
| 2018 | $18,370 | $13,527 |
| 2019 | $19,236 | $14,072 |
| 2020 | $19,594 | $14,430 |
| 2021* | $19,958 | $14,797 |
| 2022* | $20,330 | $15,172 |
| 2023* | $20,708 | $15,558 |
| 2024* | $21,093 | $15,953 |
| 2025* | $21,485 | $16,358 |
