Rath said:
http://en.wikipedia.org/wiki/Solar_variation#Global_warming Gives a good general idea and lots of links to respectable scientific articles saying pretty much that solar variation is clearly not the cause of warming in the second half of the 20th century. I don't know what data your graph follows or what the sources are or anything.
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Those use reconstructions via computer models.
When your basis is that said models don't work because they are incomplete and don't even account for half the variables in the world it really isn't much proof to you when people say their models match up with what they want.
This is further shown by the fact that they say solar brightness isn't an issue but they couldn't rule out a number of factors related to it because they don't have models for it yet.
Furthermore... (if this has been contradicted since feb let me know.)
http://www.dailytech.com/Temperature+Monitors+Report+Worldwide+Global+Cooling/article10866.htm
"A compiled list of all the sources can be seen here. The total amount of cooling ranges from 0.65C up to 0.75C -- a value large enough to wipe out most of the warming recorded over the past 100 years. All in one year's time. For all four sources, it's the single fastest temperature change ever recorded, either up or down."
Aside from which... he asked if he saw a graph like that. Not if it was accurate.
