Browser usage statistics

I usually check the browser usage statistics in Runet (professional) every Monday, I look at the weeks, so it's clearer. Today decided to see the same statistics, only by day. The schedule was very interesting:



Noticed that the peaks and falls are uniform and fall exactly on the weekend?
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Draw conclusions

1. IE6 drops the most (about 4%), i.e. it can be assumed that these 4% are set to work for visitors.
2. The situation is similar with IE7, only to a lesser extent (about 1%).
3. The fall of IE6 and IE7 is roughly proportional to the growth of “normal” browsers. Those. People prefer to use convenient and fast browsers to those that the admin has “installed” at work.
4. IE8 hardly changes its percentage.
5. Opera Mini also has a strong growth, but unlike desktop browsers, growth is more in the first part of the weekend. On the way to the country, they probably use it))

Here is the observation. Can someone find other dependencies that I overlooked?

UPD: A valuable comment made selenit