| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,539 | $12,720 |
| 2016 | $24,809 | $14,012 |
| 2017 | $24,427 | $13,088 |
| 2018 | $24,427 | $12,780 |
| 2019 | $25,657 | $14,663 |
| 2020 | $26,187 | $15,193 |
| 2021* | $26,475 | $15,741 |
| 2022* | $26,766 | $16,310 |
| 2023* | $27,061 | $16,899 |
| 2024* | $27,358 | $17,509 |
| 2025* | $27,659 | $18,141 |