| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,016 | $21,514 |
| 2016 | $37,452 | $21,193 |
| 2017 | $38,902 | $21,228 |
| 2018 | $38,902 | $21,855 |
| 2019 | $40,806 | $20,887 |
| 2020 | $41,736 | $21,817 |
| 2021* | $43,351 | $21,854 |
| 2022* | $45,029 | $21,891 |
| 2023* | $46,771 | $21,928 |
| 2024* | $48,582 | $21,966 |
| 2025* | $50,462 | $22,003 |