| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $15,312 | $10,580 |
| 2016 | $15,971 | $10,700 |
| 2017 | $16,346 | $10,832 |
| 2018 | $16,346 | $11,453 |
| 2019 | $18,466 | $11,755 |
| 2020 | $18,883 | $12,172 |
| 2021* | $19,327 | $12,493 |
| 2022* | $19,781 | $12,823 |
| 2023* | $20,246 | $13,162 |
| 2024* | $20,722 | $13,509 |
| 2025* | $21,209 | $13,866 |