| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,212 | $11,456 |
| 2016 | $22,219 | $12,193 |
| 2017 | $22,757 | $11,966 |
| 2018 | $22,757 | $12,608 |
| 2019 | $22,346 | $11,857 |
| 2020 | $22,740 | $12,251 |
| 2021* | $23,140 | $12,658 |
| 2022* | $23,547 | $13,078 |
| 2023* | $23,962 | $13,512 |
| 2024* | $24,384 | $13,961 |
| 2025* | $24,813 | $14,424 |