| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,887 | $15,827 |
| 2016 | $23,929 | $17,561 |
| 2017 | $24,635 | $17,916 |
| 2018 | $24,635 | $17,998 |
| 2019 | $26,633 | $18,872 |
| 2020 | $27,651 | $19,890 |
| 2021* | $28,707 | $20,857 |
| 2022* | $29,804 | $21,870 |
| 2023* | $30,942 | $22,933 |
| 2024* | $32,124 | $24,048 |
| 2025* | $33,352 | $25,216 |