It's "Market Share"; scale on the left is in % .
So no, it doesn't show any overall growth (or contraction) -- the sum of all the lines is (if the graph is constructed correctly for what it purports to be) a constant 100%.
[link|mailto:MyUserId@MyISP.CountryCode|Christian R. Conrad]
(I live in Finland, and my e-mail in-box is at the Saunalahti company.)
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