| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,770 | $21,881 |
| 2016 | $39,700 | $22,308 |
| 2017 | $42,520 | $24,231 |
| 2018 | $42,520 | $23,118 |
| 2019 | $45,780 | $23,672 |
| 2020 | $47,595 | $25,487 |
| 2021* | $50,027 | $26,099 |
| 2022* | $52,583 | $26,725 |
| 2023* | $55,271 | $27,366 |
| 2024* | $58,095 | $28,023 |
| 2025* | $61,063 | $28,696 |