| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,884 | $16,853 |
| 2016 | $20,817 | $15,203 |
| 2017 | $22,433 | $16,564 |
| 2018 | $22,433 | $16,937 |
| 2019 | $23,382 | $16,707 |
| 2020 | $24,162 | $17,487 |
| 2021* | $24,969 | $17,880 |
| 2022* | $25,803 | $18,283 |
| 2023* | $26,665 | $18,694 |
| 2024* | $27,555 | $19,115 |
| 2025* | $28,476 | $19,545 |
