| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,323 | $20,176 |
| 2016 | $38,718 | $20,470 |
| 2017 | $40,230 | $21,076 |
| 2018 | $40,230 | $18,734 |
| 2019 | $43,515 | $17,292 |
| 2020 | $44,864 | $18,641 |
| 2021* | $46,542 | $18,913 |
| 2022* | $48,283 | $19,189 |
| 2023* | $50,088 | $19,469 |
| 2024* | $51,962 | $19,754 |
| 2025* | $53,905 | $20,042 |