| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,546 | $11,322 |
| 2016 | $20,526 | $11,069 |
| 2017 | $20,993 | $11,622 |
| 2018 | $20,993 | $12,035 |
| 2019 | $22,169 | $10,212 |
| 2020 | $23,544 | $11,587 |
| 2021* | $24,724 | $11,998 |
| 2022* | $25,962 | $12,424 |
| 2023* | $27,263 | $12,865 |
| 2024* | $28,629 | $13,322 |
| 2025* | $30,063 | $13,795 |