| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,821 | $9,490 |
| 2016 | $17,835 | $12,288 |
| 2017 | $17,869 | $12,355 |
| 2018 | $17,869 | $12,261 |
| 2019 | $20,748 | $15,424 |
| 2020 | $20,748 | $15,424 |
| 2021* | $20,787 | $15,509 |
| 2022* | $20,827 | $15,594 |
| 2023* | $20,866 | $15,680 |
| 2024* | $20,906 | $15,766 |
| 2025* | $20,946 | $15,853 |