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Table 3 Distribution of ewes enrolled in the Norwegian Sheep Recording System in 2000 and 2010 by various characteristics

From: Time trends and epidemiological patterns of perinatal lamb mortality in Norway

  2000 2010
% %
Litter size
 1 22.9 17.7
 2 55.9 51.3
 3 19.3 26.8
 4 1.7 3.8
 >4 0.2 0.4
Age of ewe (year)
 1 21.4 23.1
 2 24.0 24.0
 3 19.4 18.7
 4 15.4 13.7
 5 10.3 9.8
 6 6.3 6.7
 >6 3.2 4.0
Lambing ease
 Normal 78.3 75.0
 Assistance, not dystocia 11.0 12.0
 Assistance, dystocia 10.7 13.0
Time of lambing
 Prior to April 1 1.1 2.2
 April 1–15 10.5 14.0
 April 16–30 39.0 40.2
 May 1–15 39.3 35.2
 May 16–31 9.4 7.9
 After May 31 0.7 0.5
Breed
 Norwegian White 77.1 80.4
 Spæl 17.6 13.0
 Old Norwegian breedsa 1.4 2.2
 Otherb 3.9 4.4
  1. Percentage distribution does not include missing values. Missing values: age for 8 ewes in 2000 and 1337 ewes in 2010; lambing ease for 2217 ewes in 2000 and 479 ewes in 2010; breed for 937 ewes in 2010
  2. aIncludes Furbearing Sheep, Old Norwegian Sheep, Old Spæl
  3. bIncludes Blazed Sheep, Fuglestad Pied, Grey Trønder, Texel, Cheviot, Oxford Down, Suffolk, Merino, Finnish Landrace, Blackface, Dorset, Charollais, Romney, and various crossbreeds