| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,721 | $12,930 |
| 2016 | $20,522 | $13,078 |
| 2017 | $21,496 | $14,409 |
| 2018 | $21,496 | $14,201 |
| 2019 | $22,269 | $14,014 |
| 2020 | $23,932 | $15,677 |
| 2021* | $24,904 | $15,856 |
| 2022* | $25,915 | $16,036 |
| 2023* | $26,967 | $16,219 |
| 2024* | $28,062 | $16,404 |
| 2025* | $29,201 | $16,591 |