| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,885 | $13,964 |
| 2016 | $19,020 | $14,165 |
| 2017 | $19,305 | $14,175 |
| 2018 | $19,305 | $14,275 |
| 2019 | $20,033 | $15,389 |
| 2020 | $20,123 | $15,479 |
| 2021* | $20,266 | $15,589 |
| 2022* | $20,410 | $15,700 |
| 2023* | $20,555 | $15,811 |
| 2024* | $20,701 | $15,923 |
| 2025* | $20,848 | $16,036 |
