| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,402 | $18,540 |
| 2016 | $28,674 | $18,824 |
| 2017 | $15,300 | $4,250 |
| 2018 | $29,140 | $18,295 |
| 2019 | $30,060 | $19,446 |
| 2020 | $30,636 | $20,022 |
| 2021* | $31,224 | $20,615 |
| 2022* | $31,824 | $21,225 |
| 2023* | $32,435 | $21,853 |
| 2024* | $33,057 | $22,500 |
| 2025* | $33,692 | $23,166 |