| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,143 | $14,715 |
| 2016 | $20,540 | $14,620 |
| 2017 | $21,111 | $15,040 |
| 2018 | $21,111 | $14,180 |
| 2019 | $22,247 | $15,282 |
| 2020 | $22,016 | $15,051 |
| 2021* | $22,450 | $14,953 |
| 2022* | $22,892 | $14,856 |
| 2023* | $23,343 | $14,759 |
| 2024* | $23,803 | $14,663 |
| 2025* | $24,272 | $14,568 |