| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,029 | $25,836 |
| 2016 | $31,127 | $26,164 |
| 2017 | $26,327 | $22,038 |
| 2018 | $26,327 | $20,721 |
| 2019 | $22,576 | $16,405 |
| 2020 | $22,822 | $16,651 |
| 2021* | $22,822 | $15,655 |
| 2022* | $22,822 | $14,719 |
| 2023* | $22,822 | $13,839 |
| 2024* | $22,822 | $13,011 |
| 2025* | $22,822 | $12,233 |