| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,540 | $23,565 |
| 2016 | $43,900 | $23,815 |
| 2017 | $46,700 | $23,322 |
| 2018 | $46,700 | $22,571 |
| 2019 | $51,090 | $22,999 |
| 2020 | $53,606 | $25,515 |
| 2021* | $56,243 | $25,785 |
| 2022* | $59,011 | $26,059 |
| 2023* | $61,914 | $26,335 |
| 2024* | $64,960 | $26,614 |
| 2025* | $68,156 | $26,896 |