| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,420 | $16,164 |
| 2016 | $23,336 | $16,616 |
| 2017 | $24,126 | $17,117 |
| 2018 | $24,126 | $16,845 |
| 2019 | $25,382 | $17,218 |
| 2020 | $24,948 | $16,784 |
| 2021* | $25,794 | $17,155 |
| 2022* | $26,668 | $17,534 |
| 2023* | $27,572 | $17,922 |
| 2024* | $28,507 | $18,318 |
| 2025* | $29,473 | $18,722 |
