| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,300 | $33,798 |
| 2016 | $36,900 | $29,536 |
| 2017 | $37,200 | $6,590 |
| 2018 | $37,200 | $32,554 |
| 2019 | $40,000 | $32,368 |
| 2020 | $40,400 | $32,768 |
| 2021* | $40,727 | $32,581 |
| 2022* | $41,057 | $32,396 |
| 2023* | $41,390 | $32,211 |
| 2024* | $41,725 | $32,027 |
| 2025* | $42,063 | $31,845 |