| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,723 | $19,561 |
| 2016 | $29,002 | $20,288 |
| 2017 | $29,918 | $20,991 |
| 2018 | $29,918 | $20,101 |
| 2019 | $31,332 | $19,775 |
| 2020 | $31,700 | $20,143 |
| 2021* | $32,702 | $20,518 |
| 2022* | $33,735 | $20,899 |
| 2023* | $34,801 | $21,288 |
| 2024* | $35,901 | $21,684 |
| 2025* | $37,035 | $22,087 |