| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,520 | $21,070 |
| 2016 | $28,030 | $22,673 |
| 2017 | $29,395 | $24,494 |
| 2018 | $29,395 | $24,193 |
| 2019 | $27,760 | $22,608 |
| 2020 | $28,540 | $23,388 |
| 2021* | $29,342 | $24,195 |
| 2022* | $30,166 | $25,030 |
| 2023* | $31,014 | $25,893 |
| 2024* | $31,886 | $26,786 |
| 2025* | $32,782 | $27,711 |