| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,182 | $21,179 |
| 2016 | $43,982 | $20,165 |
| 2017 | $44,977 | $20,267 |
| 2018 | $44,977 | $18,248 |
| 2019 | $45,866 | $16,099 |
| 2020 | $47,170 | $17,403 |
| 2021* | $48,236 | $16,569 |
| 2022* | $49,326 | $15,776 |
| 2023* | $50,441 | $15,020 |
| 2024* | $51,581 | $14,301 |
| 2025* | $52,747 | $13,616 |