| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,308 | $13,955 |
| 2016 | $23,071 | $14,321 |
| 2017 | $23,648 | $14,493 |
| 2018 | $23,648 | $13,774 |
| 2019 | $23,948 | $13,715 |
| 2020 | $24,239 | $14,006 |
| 2021* | $24,547 | $14,174 |
| 2022* | $24,859 | $14,344 |
| 2023* | $25,174 | $14,516 |
| 2024* | $25,494 | $14,690 |
| 2025* | $25,818 | $14,867 |
