| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,570 | $13,399 |
| 2016 | $23,161 | $13,140 |
| 2017 | $23,721 | $13,891 |
| 2018 | $23,721 | $14,076 |
| 2019 | $25,535 | $14,996 |
| 2020 | $26,266 | $15,727 |
| 2021* | $26,954 | $16,493 |
| 2022* | $27,660 | $17,296 |
| 2023* | $28,385 | $18,138 |
| 2024* | $29,129 | $19,022 |
| 2025* | $29,892 | $19,948 |
