| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,266 | $10,948 |
| 2016 | $21,373 | $11,125 |
| 2017 | $21,493 | $11,903 |
| 2018 | $21,493 | $11,280 |
| 2019 | $21,693 | $8,540 |
| 2020 | $22,993 | $9,840 |
| 2021* | $23,122 | $9,999 |
| 2022* | $23,251 | $10,161 |
| 2023* | $23,381 | $10,326 |
| 2024* | $23,512 | $10,493 |
| 2025* | $23,644 | $10,663 |