| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,172 | $21,560 |
| 2016 | $28,678 | $21,971 |
| 2017 | $29,392 | $22,698 |
| 2018 | $29,392 | $23,201 |
| 2019 | $31,502 | $22,436 |
| 2020 | $32,162 | $23,096 |
| 2021* | $32,837 | $23,609 |
| 2022* | $33,527 | $24,133 |
| 2023* | $34,231 | $24,669 |
| 2024* | $34,950 | $25,216 |
| 2025* | $35,684 | $25,776 |