Tekstuele beschrijving figuur 65 2017

 2007200820092010201120122013201420152016
C4 groep85%86%87%77%85%85%85%84%92%91,66%
C4 titels47%47%49%50%48%43%42%44%46%45,93%
HHI groep0,230,230,230,180,20,210,210,210,2608940,26
HHI titels0,080,080,090,080,090,070,070,070,0793380,08
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