| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,120 | $12,233 |
| 2016 | $17,325 | $16,186 |
| 2017 | $17,230 | $15,175 |
| 2018 | $17,230 | $16,708 |
| 2019 | $19,635 | $18,028 |
| 2020 | $20,175 | $18,568 |
| 2021* | $20,730 | $20,035 |
| 2022* | $21,300 | $21,618 |
| 2023* | $21,886 | $23,325 |
| 2024* | $22,487 | $25,168 |
| 2025* | $23,106 | $27,156 |