| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,090 | $23,217 |
| 2016 | $36,800 | $23,940 |
| 2017 | $38,084 | $24,308 |
| 2018 | $38,084 | $24,193 |
| 2019 | $40,932 | $26,743 |
| 2020 | $42,264 | $28,075 |
| 2021* | $43,638 | $28,948 |
| 2022* | $45,056 | $29,848 |
| 2023* | $46,520 | $30,777 |
| 2024* | $48,032 | $31,734 |
| 2025* | $49,593 | $32,721 |