| Year | KMO analysis | Bartlett Sphericity | Extract ingredients | ||
| Initial characteristic root value | The percentage of Variance (%) | Cumulative percentage (%) | |||
| 2008 | 0.645 | 0.000 | 2.216 | 73.850 | 73.850 |
| 2009 | 0.707 | 0.000 | 2.336 | 77.872 | 77.872 |
| 2010 | 0.709 | 0.000 | 2.303 | 76.776 | 76.776 |
| 2011 | 0.709 | 0.000 | 2.325 | 77.493 | 77.493 |
| 2012 | 0.707 | 0.000 | 2.371 | 79.042 | 79.042 |
| 2013 | 0.694 | 0.000 | 2.468 | 82.268 | 82.268 |
| 2014 | 0.690 | 0.000 | 2.339 | 77.959 | 77.959 |