| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,628 | $20,484 |
| 2016 | $25,278 | $20,283 |
| 2017 | $25,278 | $20,184 |
| 2018 | $25,278 | $21,272 |
| 2019 | $23,828 | $19,266 |
| 2020 | $23,557 | $18,995 |
| 2021* | $23,288 | $18,809 |
| 2022* | $23,023 | $18,625 |
| 2023* | $22,761 | $18,442 |
| 2024* | $22,501 | $18,261 |
| 2025* | $22,245 | $18,082 |
