| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,332 | $15,146 |
| 2016 | $20,823 | $13,254 |
| 2017 | $21,390 | $13,903 |
| 2018 | $21,390 | $14,592 |
| 2019 | $25,005 | $15,733 |
| 2020 | $25,485 | $16,213 |
| 2021* | $25,974 | $17,007 |
| 2022* | $26,473 | $17,841 |
| 2023* | $26,981 | $18,715 |
| 2024* | $27,499 | $19,632 |
| 2025* | $28,027 | $20,594 |