| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,257 | $10,790 |
| 2016 | $17,007 | $11,425 |
| 2017 | $21,977 | $16,562 |
| 2018 | $21,977 | $16,533 |
| 2019 | $22,441 | $16,651 |
| 2020 | $23,541 | $17,751 |
| 2021* | $24,626 | $18,797 |
| 2022* | $25,762 | $19,904 |
| 2023* | $26,949 | $21,076 |
| 2024* | $28,191 | $22,317 |
| 2025* | $29,491 | $23,632 |