| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,604 | $16,998 |
| 2016 | $23,406 | $17,698 |
| 2017 | $24,270 | $18,599 |
| 2018 | $24,270 | $18,550 |
| 2019 | $25,996 | $20,311 |
| 2020 | $25,996 | $20,311 |
| 2021* | $26,919 | $21,148 |
| 2022* | $27,874 | $22,019 |
| 2023* | $28,864 | $22,926 |
| 2024* | $29,889 | $23,871 |
| 2025* | $30,950 | $24,854 |