| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,940 | $17,085 |
| 2016 | $15,978 | $11,469 |
| 2017 | $16,014 | $11,769 |
| 2018 | $16,014 | $11,520 |
| 2019 | $16,950 | $12,704 |
| 2020 | $17,210 | $12,964 |
| 2021* | $17,250 | $13,230 |
| 2022* | $17,289 | $13,501 |
| 2023* | $17,329 | $13,778 |
| 2024* | $17,369 | $14,060 |
| 2025* | $17,409 | $14,348 |
