| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,975 | $19,514 |
| 2016 | $27,135 | $19,820 |
| 2017 | $27,464 | $19,240 |
| 2018 | $27,464 | $19,204 |
| 2019 | $29,797 | $21,696 |
| 2020 | $31,798 | $23,697 |
| 2021* | $32,183 | $24,069 |
| 2022* | $32,572 | $24,447 |
| 2023* | $32,966 | $24,831 |
| 2024* | $33,365 | $25,221 |
| 2025* | $33,769 | $25,617 |