| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,251 | $17,232 |
| 2016 | $24,861 | $17,226 |
| 2017 | $26,100 | $18,177 |
| 2018 | $26,100 | $18,038 |
| 2019 | $28,269 | $18,871 |
| 2020 | $27,615 | $18,217 |
| 2021* | $28,311 | $18,212 |
| 2022* | $29,024 | $18,206 |
| 2023* | $29,756 | $18,201 |
| 2024* | $30,506 | $18,195 |
| 2025* | $31,274 | $18,190 |