| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,992 | $18,718 |
| 2016 | $24,342 | $19,563 |
| 2017 | $25,114 | $19,365 |
| 2018 | $25,114 | $19,432 |
| 2019 | $28,108 | $21,692 |
| 2020 | $28,220 | $21,804 |
| 2021* | $28,632 | $21,917 |
| 2022* | $29,050 | $22,031 |
| 2023* | $29,474 | $22,146 |
| 2024* | $29,904 | $22,261 |
| 2025* | $30,341 | $22,377 |
