| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,780 | $21,889 |
| 2016 | $32,763 | $23,019 |
| 2017 | $34,176 | $23,408 |
| 2018 | $34,176 | $23,776 |
| 2019 | $34,348 | $22,979 |
| 2020 | $34,342 | $22,973 |
| 2021* | $34,514 | $23,334 |
| 2022* | $34,686 | $23,700 |
| 2023* | $34,860 | $24,072 |
| 2024* | $35,034 | $24,450 |
| 2025* | $35,209 | $24,834 |