| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $9,834 | $7,106 |
| 2016 | $10,018 | $5,673 |
| 2017 | $10,482 | $7,914 |
| 2018 | $10,482 | $5,612 |
| 2019 | $12,174 | $8,053 |
| 2020 | $14,216 | $10,095 |
| 2021* | $14,874 | $12,655 |
| 2022* | $15,563 | $15,864 |
| 2023* | $16,283 | $19,888 |
| 2024* | $17,037 | $24,931 |
| 2025* | $17,826 | $31,254 |