| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,324 | $14,850 |
| 2016 | $23,744 | $14,703 |
| 2017 | $24,660 | $15,236 |
| 2018 | $24,660 | $16,176 |
| 2019 | $27,280 | $16,537 |
| 2020 | $27,754 | $17,011 |
| 2021* | $28,254 | $17,499 |
| 2022* | $28,762 | $18,001 |
| 2023* | $29,280 | $18,518 |
| 2024* | $29,807 | $19,050 |
| 2025* | $30,343 | $19,596 |