Labour vote share, percentage
1979
36.9
50%
1983
27.6
1987
30.8
1992
34.7
1997
43.2
2001
40.7
2005
35.2
2010
29.0
2015
30.4
Number of votes cast, millions
13.52
11.51
11.56
10.72
10.03
9.55
9.35
8.46
8.61
1979
83
87
92
97
01
05
10
15
Labour vote share, percentage
Number of votes cast, millions
13.52
1979
36.9
50%
11.51
11.56
1983
27.6
10.72
10.03
9.55
1987
30.8
9.35
8.46
8.61
1992
34.7
1997
43.2
2001
40.7
2005
35.2
2010
29.0
2015
30.4
1979
83
87
92
97
01
05
10
15
Guardian graphic | Source: House of Commons Library