| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,060 | $29,109 |
| 2016 | $35,096 | $29,378 |
| 2017 | $33,296 | $26,854 |
| 2018 | $33,296 | $26,185 |
| 2019 | $34,534 | $28,837 |
| 2020 | $35,136 | $29,439 |
| 2021* | $35,171 | $29,710 |
| 2022* | $35,206 | $29,983 |
| 2023* | $35,242 | $30,259 |
| 2024* | $35,277 | $30,537 |
| 2025* | $35,312 | $30,818 |