German Microcensus 1996 MZ1996 Age Group, 4 groups 1 20-29 2 30-39 3 40-49 4 50-59 Age Group, 2 groups $(\mathrm{V10}=1)\lor (\mathrm{V10}=2)$ 1 20-39 $(\mathrm{V10}=3)\lor (\mathrm{V10}=4)$ 2 40-59