| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,933 | $11,564 |
| 2016 | $19,106 | $10,416 |
| 2017 | $19,815 | $10,157 |
| 2018 | $19,815 | $12,181 |
| 2019 | $21,778 | $13,923 |
| 2020 | $21,878 | $14,023 |
| 2021* | $22,077 | $14,124 |
| 2022* | $22,278 | $14,226 |
| 2023* | $22,481 | $14,328 |
| 2024* | $22,685 | $14,431 |
| 2025* | $22,892 | $14,535 |
