| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,832 | $16,765 |
| 2016 | $24,909 | $18,478 |
| 2017 | $26,702 | $20,992 |
| 2018 | $26,702 | $19,752 |
| 2019 | $25,817 | $17,427 |
| 2020 | $26,677 | $18,287 |
| 2021* | $27,565 | $19,189 |
| 2022* | $28,483 | $20,135 |
| 2023* | $29,432 | $21,127 |
| 2024* | $30,412 | $22,169 |
| 2025* | $31,425 | $23,262 |
