Latest Stats as at 28/4/2012.
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These figures cover the 15-day period 1/4/2012 to 15/4/2012.

I have been sitting on these results for about 10 days, 
because they don't seem right, but I cannot spot any flaw.

Basically the figures for iPhones and Safari seem too high 
and the figures for Windows 7 and Windows XP with the Internet
Explorer browser seem correspondingly too low.



Operating System Market Share
==============================

For the period 1st to 15th April, these percentage 
figures are based on visits, with earlier figures in brackets:-

Windows-7 32.3 (34.3, 34.7, 33.7, 32.1, 31.7, 31.4, 30.7, 31.6) 
XP 19.7 (23.7, 23.9, 24.5, 25.9, 25.6, 24.0, 23.6, 29.6, 27.4)
Vista 7.7 (7.4, 7.3, 7.5, 7.6, 8.2, 8.3, 8.7, 8.9, 9.4, 8.7)
Pre-XP Windows 1.0 (1.1, 1.3, 1.2, 1.4, 1.2, 0.9, 0.9, 1.7, 1.9)
Mac 12.6 (12.5, 12.4, 12.3, 12.5, 11.6, 11.7, 11.8, 11.7, 12.3)
iPhone etc 19.4 (14.4, 13.9, 14.1, 13.8, 14.7, 16.7, 16.7)
Android 3.4 (2.9, 2.7, 2.8, 2.6, 2.7, 3.0, 3.1, 2.0, 2.5, 2.1) 
Other Mobiles 2.9 (2.9, 3.0, 3.3, 3.5, 3.2, 3.6, 3.1)
Linux 1.1 (0.8, 0.8, 1.0, 0.8, 0.8, 0.8, 0.9, 0.8, 0.8, 0.7) 

The total sample size above was 16075.


Browser Breakup
===============

Percentages of visits for the period 1st to 15th April 2012:-

IE 30.3 (36.1, 36.7, 34.8, 35.8, 35.5, 33.1, 31.7, 39.8)
Safari 28.3 (23.7, 23.1, 23.3, 25.1, 25.6, 28.0, 28.0, 21.1)
Chrome 21.5 (20.8, 21.0, 20.9, 18.1, 17.5, 17.6, 17.9)
FF 16.2 (15.7, 15.5, 17.0, 16.4, 17.0, 17.3, 17.9, 18.1)  
Opera 2.0 (2.2, 2.2, 2.2, 2.4, 2.2, 1.9, 2.2, 2.3, 2.4, 1.9)
All Others 1.9 (1.5, 1.6, 1.8, 2.2, 2.2, 2.1, 2.3, 1.8, 1.6)

The sample size was 16139 visits by humans. 


Search Engines Share
==================== 

Percentage breakup of visits coming via search engines 
for April 1st to 15th, 2012:-

Google 90.2 (89.7, 90.2, 90.6, 91.0, 91.2, 91.8, 91.1, 90.4)
Bing 3.2 (3.8, 3.6, 3.3, 3.2, 3.0, 2.7, 3.1, 3.1, 3.9, 4.1, 3.5)
Yahoo 3.3 (3.4, 3.2, 3.1, 2.9, 2.8, 2.7, 3.1, 2.9, 3.5, 3.5, 3.6)
All others 3.3 (3.1, 3.0, 2.9, 3.0, 2.9, 2.8, 2.8, 3.7, 2.7, 2.4)

The sample size above was 9901 visits.  

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