| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,479 | $20,066 |
| 2016 | $28,062 | $22,757 |
| 2017 | $28,314 | $21,223 |
| 2018 | $28,314 | $21,688 |
| 2019 | $29,430 | $20,782 |
| 2020 | $29,742 | $21,094 |
| 2021* | $30,057 | $21,410 |
| 2022* | $30,376 | $21,732 |
| 2023* | $30,698 | $22,058 |
| 2024* | $31,023 | $22,388 |
| 2025* | $31,352 | $22,724 |
