| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,062 | $15,625 |
| 2016 | $19,836 | $14,277 |
| 2017 | $20,152 | $17,628 |
| 2018 | $20,152 | $15,983 |
| 2019 | $21,167 | $17,407 |
| 2020 | $21,042 | $17,282 |
| 2021* | $21,377 | $17,158 |
| 2022* | $21,716 | $17,034 |
| 2023* | $22,062 | $16,911 |
| 2024* | $22,413 | $16,790 |
| 2025* | $22,769 | $16,669 |
