| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,853 | $10,038 |
| 2016 | $15,025 | $10,269 |
| 2017 | $15,121 | $10,331 |
| 2018 | $15,121 | $9,689 |
| 2019 | $15,479 | $9,441 |
| 2020 | $15,575 | $9,537 |
| 2021* | $15,675 | $9,594 |
| 2022* | $15,775 | $9,652 |
| 2023* | $15,876 | $9,710 |
| 2024* | $15,978 | $9,768 |
| 2025* | $16,080 | $9,827 |