| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,808 | $33,512 |
| 2016 | $38,540 | $34,243 |
| 2017 | $39,600 | $32,825 |
| 2018 | $39,600 | $36,718 |
| 2019 | $41,180 | $35,085 |
| 2020 | $42,628 | $36,533 |
| 2021* | $43,800 | $37,329 |
| 2022* | $45,005 | $38,143 |
| 2023* | $46,242 | $38,975 |
| 2024* | $47,514 | $39,824 |
| 2025* | $48,821 | $40,693 |