| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,600 | $15,736 |
| 2016 | $30,400 | $16,130 |
| 2017 | $30,500 | $17,380 |
| 2018 | $30,500 | $18,566 |
| 2019 | $34,185 | $20,870 |
| 2020 | $33,850 | $20,535 |
| 2021* | $33,962 | $21,935 |
| 2022* | $34,074 | $23,431 |
| 2023* | $34,186 | $25,030 |
| 2024* | $34,299 | $26,737 |
| 2025* | $34,412 | $28,560 |