| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,964 | $12,848 |
| 2016 | $23,610 | $15,646 |
| 2017 | $24,066 | $15,916 |
| 2018 | $24,066 | $15,612 |
| 2019 | $25,258 | $16,140 |
| 2020 | $24,206 | $15,088 |
| 2021* | $24,673 | $15,349 |
| 2022* | $25,149 | $15,615 |
| 2023* | $25,635 | $15,885 |
| 2024* | $26,130 | $16,159 |
| 2025* | $26,634 | $16,439 |
