| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,296 | $13,114 |
| 2016 | $22,257 | $12,340 |
| 2017 | $22,550 | $12,349 |
| 2018 | $22,550 | $11,203 |
| 2019 | $23,305 | $11,456 |
| 2020 | $23,668 | $11,819 |
| 2021* | $23,980 | $11,827 |
| 2022* | $24,297 | $11,836 |
| 2023* | $24,618 | $11,844 |
| 2024* | $24,943 | $11,852 |
| 2025* | $25,272 | $11,860 |
