| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,485 | $15,730 |
| 2016 | $34,391 | $15,980 |
| 2017 | $34,663 | $15,216 |
| 2018 | $34,663 | $13,414 |
| 2019 | $35,387 | $14,324 |
| 2020 | $35,357 | $14,294 |
| 2021* | $35,636 | $14,264 |
| 2022* | $35,918 | $14,234 |
| 2023* | $36,202 | $14,204 |
| 2024* | $36,488 | $14,174 |
| 2025* | $36,776 | $14,145 |