| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,008 | $18,070 |
| 2016 | $28,200 | $20,992 |
| 2017 | $28,689 | $20,882 |
| 2018 | $28,689 | $21,448 |
| 2019 | $29,152 | $21,093 |
| 2020 | $29,794 | $21,735 |
| 2021* | $30,309 | $22,324 |
| 2022* | $30,834 | $22,929 |
| 2023* | $31,367 | $23,550 |
| 2024* | $31,910 | $24,189 |
| 2025* | $32,462 | $24,844 |
