| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,148 | $13,555 |
| 2016 | $21,376 | $13,820 |
| 2017 | $21,412 | $11,939 |
| 2018 | $21,412 | $12,122 |
| 2019 | $23,805 | $13,531 |
| 2020 | $21,557 | $11,283 |
| 2021* | $21,594 | $11,456 |
| 2022* | $21,630 | $11,631 |
| 2023* | $21,667 | $11,809 |
| 2024* | $21,704 | $11,990 |
| 2025* | $21,741 | $12,173 |
