| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,696 | $17,279 |
| 2016 | $29,201 | $21,533 |
| 2017 | $29,951 | $22,264 |
| 2018 | $29,951 | $22,386 |
| 2019 | $30,689 | $21,903 |
| 2020 | $30,234 | $21,448 |
| 2021* | $30,978 | $21,566 |
| 2022* | $31,740 | $21,685 |
| 2023* | $32,521 | $21,804 |
| 2024* | $33,321 | $21,924 |
| 2025* | $34,140 | $22,044 |