| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,710 | $27,879 |
| 2016 | $36,940 | $27,146 |
| 2017 | $37,790 | $28,173 |
| 2018 | $37,790 | $26,819 |
| 2019 | $40,630 | $28,544 |
| 2020 | $42,120 | $30,034 |
| 2021* | $43,089 | $31,169 |
| 2022* | $44,080 | $32,347 |
| 2023* | $45,094 | $33,570 |
| 2024* | $46,131 | $34,839 |
| 2025* | $47,192 | $36,156 |