| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,087 | $14,008 |
| 2016 | $22,691 | $14,187 |
| 2017 | $23,242 | $14,894 |
| 2018 | $23,242 | $14,946 |
| 2019 | $24,244 | $14,811 |
| 2020 | $24,244 | $14,811 |
| 2021* | $24,833 | $14,863 |
| 2022* | $25,437 | $14,915 |
| 2023* | $26,055 | $14,967 |
| 2024* | $26,688 | $15,019 |
| 2025* | $27,336 | $15,072 |