| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,878 | $20,377 |
| 2016 | $27,156 | $21,395 |
| 2017 | $25,347 | $19,352 |
| 2018 | $25,347 | $18,733 |
| 2019 | $28,350 | $22,902 |
| 2020 | $29,050 | $23,602 |
| 2021* | $29,768 | $24,324 |
| 2022* | $30,503 | $25,069 |
| 2023* | $31,256 | $25,836 |
| 2024* | $32,028 | $26,626 |
| 2025* | $32,819 | $27,441 |
