| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,467 | $9,973 |
| 2016 | $20,221 | $11,041 |
| 2017 | $21,276 | $12,180 |
| 2018 | $21,276 | $12,679 |
| 2019 | $23,424 | $14,474 |
| 2020 | $23,424 | $14,474 |
| 2021* | $24,331 | $15,968 |
| 2022* | $25,272 | $17,616 |
| 2023* | $26,250 | $19,434 |
| 2024* | $27,266 | $21,439 |
| 2025* | $28,321 | $23,652 |