| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,348 | $16,968 |
| 2016 | $24,218 | $19,984 |
| 2017 | $25,342 | $21,295 |
| 2018 | $25,342 | $21,027 |
| 2019 | $26,430 | $21,055 |
| 2020 | $24,508 | $19,133 |
| 2021* | $25,559 | $19,158 |
| 2022* | $26,656 | $19,183 |
| 2023* | $27,799 | $19,208 |
| 2024* | $28,992 | $19,233 |
| 2025* | $30,236 | $19,258 |