| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,372 | $15,212 |
| 2016 | $19,424 | $11,083 |
| 2017 | $21,932 | $12,667 |
| 2018 | $21,932 | $13,674 |
| 2019 | $24,300 | $14,169 |
| 2020 | $25,530 | $15,399 |
| 2021* | $26,822 | $16,623 |
| 2022* | $28,179 | $17,945 |
| 2023* | $29,605 | $19,371 |
| 2024* | $31,103 | $20,911 |
| 2025* | $32,677 | $22,574 |