| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,713 | $16,259 |
| 2016 | $22,702 | $16,841 |
| 2017 | $23,672 | $17,293 |
| 2018 | $23,672 | $17,477 |
| 2019 | $24,956 | $18,095 |
| 2020 | $24,925 | $18,064 |
| 2021* | $25,989 | $18,548 |
| 2022* | $27,099 | $19,045 |
| 2023* | $28,256 | $19,556 |
| 2024* | $29,463 | $20,080 |
| 2025* | $30,721 | $20,618 |
