| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,630 | $14,274 |
| 2016 | $22,857 | $14,025 |
| 2017 | $23,166 | $13,891 |
| 2018 | $23,166 | $14,965 |
| 2019 | $24,352 | $14,675 |
| 2020 | $25,115 | $15,438 |
| 2021* | $25,454 | $15,290 |
| 2022* | $25,798 | $15,143 |
| 2023* | $26,146 | $14,998 |
| 2024* | $26,499 | $14,854 |
| 2025* | $26,857 | $14,711 |
