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DatumAantal gecertificeerde installateurs
stringnumber
nov/12997
dec/12866
jan/13783
feb/131096
mrt/131158
apr/131316
mei/131426
jun/131211
jul/131765
aug/13830
sep/131412
okt/131678
nov/131615
dec/131274
jan/141851
feb/141668
mrt/141759
apr/141718
mei/141317
jun/141388