| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,741 | $18,856 |
| 2016 | $31,236 | $21,041 |
| 2017 | $33,059 | $21,500 |
| 2018 | $33,059 | $20,159 |
| 2019 | $32,088 | $19,122 |
| 2020 | $32,688 | $19,722 |
| 2021* | $33,299 | $20,152 |
| 2022* | $33,922 | $20,591 |
| 2023* | $34,556 | $21,040 |
| 2024* | $35,203 | $21,499 |
| 2025* | $35,861 | $21,967 |