| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,104 | $9,775 |
| 2016 | $23,620 | $14,620 |
| 2017 | $24,247 | $14,861 |
| 2018 | $24,247 | $14,960 |
| 2019 | $24,926 | $14,592 |
| 2020 | $22,588 | $12,254 |
| 2021* | $23,187 | $12,336 |
| 2022* | $23,801 | $12,419 |
| 2023* | $24,432 | $12,502 |
| 2024* | $25,079 | $12,586 |
| 2025* | $25,744 | $12,670 |