| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,362 | $19,264 |
| 2016 | $22,605 | $19,459 |
| 2017 | $23,805 | $20,480 |
| 2018 | $23,805 | $20,072 |
| 2019 | $23,721 | $17,896 |
| 2020 | $23,943 | $18,118 |
| 2021* | $24,168 | $18,301 |
| 2022* | $24,395 | $18,486 |
| 2023* | $24,625 | $18,673 |
| 2024* | $24,856 | $18,861 |
| 2025* | $25,090 | $19,052 |