| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,094 | $11,564 |
| 2016 | $20,726 | $11,936 |
| 2017 | $21,390 | $12,373 |
| 2018 | $21,390 | $11,803 |
| 2019 | $22,443 | $11,862 |
| 2020 | $22,543 | $11,962 |
| 2021* | $23,253 | $12,062 |
| 2022* | $23,986 | $12,164 |
| 2023* | $24,741 | $12,266 |
| 2024* | $25,520 | $12,369 |
| 2025* | $26,324 | $12,473 |