| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,506 | $9,818 |
| 2016 | $14,877 | $10,082 |
| 2017 | $15,007 | $10,608 |
| 2018 | $15,007 | $10,286 |
| 2019 | $15,379 | $9,750 |
| 2020 | $15,344 | $9,715 |
| 2021* | $15,477 | $9,680 |
| 2022* | $15,612 | $9,645 |
| 2023* | $15,748 | $9,610 |
| 2024* | $15,885 | $9,576 |
| 2025* | $16,023 | $9,541 |
