| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,050 | $20,734 |
| 2016 | $37,300 | $22,380 |
| 2017 | $37,030 | $21,339 |
| 2018 | $37,030 | $20,731 |
| 2019 | $38,900 | $23,077 |
| 2020 | $39,970 | $24,147 |
| 2021* | $41,069 | $25,267 |
| 2022* | $42,199 | $26,440 |
| 2023* | $43,359 | $27,667 |
| 2024* | $44,551 | $28,950 |
| 2025* | $45,777 | $30,294 |