| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,964 | $19,452 |
| 2016 | $27,048 | $19,625 |
| 2017 | $27,432 | $20,076 |
| 2018 | $27,432 | $19,084 |
| 2019 | $29,765 | $21,138 |
| 2020 | $31,766 | $23,139 |
| 2021* | $32,217 | $23,671 |
| 2022* | $32,675 | $24,216 |
| 2023* | $33,139 | $24,773 |
| 2024* | $33,609 | $25,342 |
| 2025* | $34,086 | $25,925 |