| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,704 | $15,252 |
| 2016 | $26,263 | $15,261 |
| 2017 | $27,530 | $16,591 |
| 2018 | $27,530 | $15,449 |
| 2019 | $29,103 | $16,205 |
| 2020 | $29,578 | $16,680 |
| 2021* | $30,220 | $17,169 |
| 2022* | $30,876 | $17,672 |
| 2023* | $31,546 | $18,190 |
| 2024* | $32,230 | $18,723 |
| 2025* | $32,930 | $19,271 |