| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,400 | $20,897 |
| 2016 | $28,900 | $19,090 |
| 2017 | $29,700 | $20,473 |
| 2018 | $29,700 | $20,035 |
| 2019 | $30,700 | $24,375 |
| 2020 | $31,900 | $25,575 |
| 2021* | $32,784 | $26,833 |
| 2022* | $33,692 | $28,153 |
| 2023* | $34,625 | $29,539 |
| 2024* | $35,584 | $30,992 |
| 2025* | $36,570 | $32,517 |
