| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,627 | $9,142 |
| 2016 | $20,238 | $13,359 |
| 2017 | $20,993 | $11,862 |
| 2018 | $20,993 | $11,843 |
| 2019 | $23,942 | $18,408 |
| 2020 | $24,539 | $19,005 |
| 2021* | $25,150 | $19,621 |
| 2022* | $25,776 | $20,256 |
| 2023* | $26,418 | $20,913 |
| 2024* | $27,076 | $21,590 |
| 2025* | $27,750 | $22,290 |