| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,885 | $16,439 |
| 2016 | $24,177 | $16,005 |
| 2017 | $24,859 | $16,848 |
| 2018 | $24,859 | $17,468 |
| 2019 | $26,211 | $17,572 |
| 2020 | $26,205 | $17,566 |
| 2021* | $26,525 | $17,671 |
| 2022* | $26,848 | $17,777 |
| 2023* | $27,176 | $17,884 |
| 2024* | $27,507 | $17,991 |
| 2025* | $27,843 | $18,099 |
