| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,727 | $22,331 |
| 2016 | $26,630 | $23,324 |
| 2017 | $26,918 | $21,339 |
| 2018 | $26,918 | $22,887 |
| 2019 | $27,312 | $25,062 |
| 2020 | $27,314 | $25,064 |
| 2021* | $27,609 | $26,179 |
| 2022* | $27,907 | $27,344 |
| 2023* | $28,209 | $28,561 |
| 2024* | $28,513 | $29,832 |
| 2025* | $28,821 | $31,160 |