| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,963 | $12,072 |
| 2016 | $18,016 | $10,634 |
| 2017 | $18,919 | $11,220 |
| 2018 | $18,919 | $10,774 |
| 2019 | $20,363 | $11,629 |
| 2020 | $20,768 | $12,034 |
| 2021* | $21,181 | $12,453 |
| 2022* | $21,603 | $12,886 |
| 2023* | $22,033 | $13,335 |
| 2024* | $22,471 | $13,799 |
| 2025* | $22,918 | $14,279 |
