Britain enjoys the highest search volume of nhs across the world,we can see from the chart,in January 2004,the volume was 60%,after that,it had been decreasing and increasing with fluctuation.But we can see from the chart,it always got to a bottom in December every year.When got to July 2009,it eventually reached its peak,increased by 40% than in January.But decreased rapidly after that,had several fluctuations until now with the search volume of 77%.
England has the highest search volume across the Britain ,the next is Scotland of 83%,Welsh of 74%,northern island of 36%.