| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,778 | $16,650 |
| 2016 | $28,104 | $15,061 |
| 2017 | $28,120 | $16,404 |
| 2018 | $28,120 | $15,531 |
| 2019 | $28,778 | $16,167 |
| 2020 | $29,199 | $16,588 |
| 2021* | $29,541 | $17,019 |
| 2022* | $29,886 | $17,462 |
| 2023* | $30,236 | $17,916 |
| 2024* | $30,590 | $18,382 |
| 2025* | $30,948 | $18,860 |