The survey is almost comparable from 1982 onwards. There is also a high degree of comparability with other European countries. Between 2009 and 2010 there is, however, a small break in the comparability since the statistics from 2010 onwards includes a number of small farms and additionally farms with fur animals. It means that the number of farms in 2010 is about 1.200 bigger than it otherwise would have been.
From around 1900 to 1981 the statistical surveys also included very small farms with an area of only hectares. These figures are available for the users in paper publications, but not online.
Since 2010 all member states in EU has used the same threshold for inclusion of farms in the farm structure surveys. For this reason there is a high degree of comparability between countries. Denmark includes farms with fur animals – no other EU country does so. Denmark has about 800 farms with fur animals with no other agricultural activities, neither other livestock nor crops.
The figures from the statistics are almost perfectly comparable from 1982 onwards.
Generally the sample has been quite big with a participation of about 20-35 per cent of all holdings, in 2003, 2005 and 2007 even about 50 per cent.
The surveys have always had a lower threshold so that small holdings are excluded from the survey. This threshold has currently been revised through the years:
From 2010 Eurostat introduced in co-operation with the EU member states a harmonization of the thresholds for inclusion of holdings in the survey. These thresholds are described in regulation 1166/2008 in Annex II. They are minimum requirements which could be complemented by more strict national requirements. Hereafter Statistics Denmark includes all holdings which fulfill just one of the following criteria:
From 2010 Statistics Denmark has included holdings with fur animals in the agricultural and horticultural survey.
These new thresholds mean that the number of farms is about 1.200 bigger than it would have been otherwise.
The statistics are comparable the statistics on pigs and cattle.
For each survey all the collected answers are stored in one register with all survey characteristics included in the survey. There is one and only one extrapolation factor per farm. For this reason no inconsistency can occur.