| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,602 | $26,191 |
| 2016 | $38,133 | $25,930 |
| 2017 | $37,560 | $24,013 |
| 2018 | $37,560 | $23,742 |
| 2019 | $39,495 | $24,029 |
| 2020 | $41,520 | $26,054 |
| 2021* | $42,105 | $25,793 |
| 2022* | $42,699 | $25,536 |
| 2023* | $43,301 | $25,280 |
| 2024* | $43,912 | $25,027 |
| 2025* | $44,531 | $24,777 |