| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $15,973 | $11,665 |
| 2016 | $19,775 | $15,302 |
| 2017 | $20,364 | $15,738 |
| 2018 | $20,364 | $15,785 |
| 2019 | $21,057 | $15,978 |
| 2020 | $21,240 | $16,161 |
| 2021* | $21,873 | $16,358 |
| 2022* | $22,525 | $16,558 |
| 2023* | $23,196 | $16,760 |
| 2024* | $23,887 | $16,964 |
| 2025* | $24,599 | $17,171 |