| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,400 | $10,683 |
| 2016 | $21,100 | $11,196 |
| 2017 | $22,100 | $11,569 |
| 2018 | $22,100 | $11,307 |
| 2019 | $23,600 | $11,279 |
| 2020 | $24,100 | $11,779 |
| 2021* | $24,927 | $12,171 |
| 2022* | $25,782 | $12,577 |
| 2023* | $26,666 | $12,995 |
| 2024* | $27,581 | $13,428 |
| 2025* | $28,527 | $13,875 |