| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,372 | $15,822 |
| 2016 | $23,606 | $15,780 |
| 2017 | $24,822 | $16,101 |
| 2018 | $24,822 | $15,180 |
| 2019 | $25,762 | $14,007 |
| 2020 | $25,762 | $14,007 |
| 2021* | $26,020 | $13,969 |
| 2022* | $26,280 | $13,931 |
| 2023* | $26,543 | $13,894 |
| 2024* | $26,808 | $13,856 |
| 2025* | $27,076 | $13,819 |