| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,146 | $12,431 |
| 2016 | $21,791 | $13,497 |
| 2017 | $22,569 | $13,704 |
| 2018 | $22,569 | $13,893 |
| 2019 | $23,650 | $14,692 |
| 2020 | $24,210 | $15,252 |
| 2021* | $24,948 | $15,833 |
| 2022* | $25,709 | $16,436 |
| 2023* | $26,493 | $17,063 |
| 2024* | $27,302 | $17,713 |
| 2025* | $28,134 | $18,388 |
