| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,914 | $26,434 |
| 2016 | $32,433 | $26,602 |
| 2017 | $35,514 | $30,176 |
| 2018 | $35,514 | $29,915 |
| 2019 | $33,114 | $25,633 |
| 2020 | $41,900 | $34,419 |
| 2021* | $42,583 | $34,639 |
| 2022* | $43,277 | $34,861 |
| 2023* | $43,982 | $35,084 |
| 2024* | $44,699 | $35,309 |
| 2025* | $45,428 | $35,535 |