Table:
text: Usage share of web browsers
Desktop and mobile browser usage
Global desktop stats from StatCounter (Top 5 browsers)
Date_ Internet_Explorer Firefox Safari Opera
January 2011 46.00% 30.68% 5.09% 2.00%
December 2010 46.94% 30.76% 4.79% 2.07%
November 2010 48.16% 31.17% 4.70% 2.01%
October 2010 49.21% 31.24% 4.56% 2.00%
September 2010 49.87% 31.50% 4.42% 2.03%
August 2010 51.34% 31.09% 4.23% 1.88%
July 2010 52.68% 30.69% 4.09% 1.91%
June 2010 52.86% 31.15% 4.07% 1.91%
May 2010 52.77% 31.64% 4.14% 1.96%
April 2010 53.26% 31.74% 4.23% 1.82%
March 2010 54.44% 31.27% 4.16% 1.97%
February 2010 54.50% 31.82% 4.08% 1.97%
January 2010 55.25% 31.64% 3.76% 2.00%
December 2009 55.72% 31.97% 3.48% 2.06%
November 2009 56.57% 32.21% 3.67% 2.02%
October 2009 57.96% 31.82% 3.47% 1.88%
September 2009 58.37% 31.34% 3.28% 2.62%

Question: Among the usage shares of web browsers, desktop and mobile browsers, what percentage of browsers used Safari during the period when 31.27% used Firefox?

Question: Considering web browser usage, what percentage of browsers used Opera in October 2010 in Statcounter global statistics ( Top 5 Browsers ), Desktop and Mobile Browser Usage ?

Question: What percentage of web browsers used Opera in November 2009 of Statcounter Global Statistics ( Top 5 Browsers ) Desktop and Mobile Browser Usage ?