| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,412 | $17,546 |
| 2016 | $23,928 | $15,361 |
| 2017 | $24,950 | $16,542 |
| 2018 | $24,950 | $17,770 |
| 2019 | $27,042 | $17,669 |
| 2020 | $27,446 | $18,073 |
| 2021* | $28,050 | $18,487 |
| 2022* | $28,667 | $18,910 |
| 2023* | $29,298 | $19,343 |
| 2024* | $29,942 | $19,786 |
| 2025* | $30,601 | $20,239 |
