| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,352 | $13,616 |
| 2016 | $24,862 | $16,094 |
| 2017 | $25,742 | $16,656 |
| 2018 | $25,742 | $16,758 |
| 2019 | $27,130 | $17,341 |
| 2020 | $27,822 | $18,033 |
| 2021* | $28,531 | $18,662 |
| 2022* | $29,259 | $19,314 |
| 2023* | $30,005 | $19,988 |
| 2024* | $30,770 | $20,685 |
| 2025* | $31,555 | $21,407 |