| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,160 | $14,234 |
| 2016 | $19,840 | $14,759 |
| 2017 | $20,148 | $14,195 |
| 2018 | $20,148 | $14,326 |
| 2019 | $21,838 | $15,317 |
| 2020 | $22,594 | $16,073 |
| 2021* | $23,376 | $16,666 |
| 2022* | $24,185 | $17,281 |
| 2023* | $25,021 | $17,919 |
| 2024* | $25,887 | $18,580 |
| 2025* | $26,783 | $19,266 |