| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,366 | $12,601 |
| 2016 | $18,519 | $12,190 |
| 2017 | $18,054 | $12,016 |
| 2018 | $18,054 | $12,201 |
| 2019 | $18,676 | $12,154 |
| 2020 | $19,242 | $12,720 |
| 2021* | $19,402 | $12,670 |
| 2022* | $19,563 | $12,621 |
| 2023* | $19,725 | $12,572 |
| 2024* | $19,889 | $12,523 |
| 2025* | $20,054 | $12,474 |
