Samples analysed by IZSLER (number of head)
Survey date 2017 2018 2019
January
8.149
8.180
7.774
February
8.168
8.045
7.865
March
8.039
8.146
8.388
April
8.185
8.185
8.016
May
8.219
8.219
8.271
June
8.041
8.041
7.842
July
8.032
7.865
7.790
August
8.044
7.606
7.651
September
8.053
7.827
7.969
October
8.298
8.032
8.093
November
8.243
7.889
7.984
December
7.834
7.702
7.635