| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,947 | $14,193 |
| 2016 | $23,239 | $15,378 |
| 2017 | $21,934 | $13,269 |
| 2018 | $21,934 | $13,564 |
| 2019 | $22,278 | $12,501 |
| 2020 | $22,637 | $12,860 |
| 2021* | $22,924 | $13,145 |
| 2022* | $23,216 | $13,437 |
| 2023* | $23,510 | $13,736 |
| 2024* | $23,809 | $14,041 |
| 2025* | $24,111 | $14,352 |
