| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,510 | $12,546 |
| 2016 | $18,586 | $12,962 |
| 2017 | $20,992 | $15,568 |
| 2018 | $20,992 | $14,851 |
| 2019 | $24,076 | $16,622 |
| 2020 | $24,330 | $16,876 |
| 2021* | $25,826 | $17,436 |
| 2022* | $27,415 | $18,015 |
| 2023* | $29,101 | $18,613 |
| 2024* | $30,890 | $19,231 |
| 2025* | $32,790 | $19,870 |