Toggle Arithmetic/Logarithmic scale
Year
Sweden
Thailand
United States of America
1950
-
-
5.21
1951
5.28
-
5.25
1952
5.85
-
5.50
1953
5.17
-
5.36
1954
5.35
-
5.37
1955
4.76
-
5.60
1956
5.42
-
5.79
1957
5.60
0.57
5.81
1958
6.02
0.44
6.05
1959
5.93
0.61
6.18
1960
5.11
0.76
6.31
1961
5.79
0.78
6.83
1962
5.61
0.77
7.15
1963
5.74
0.88
7.67
1964
5.18
1.21
7.86
1965
5.90
1.04
8.57
1966
5.57
1.11
9.15
1967
7.09
1.16
9.81
1968
6.37
1.11
11.21
1969
6.50
1.17
12.02
1970
6.92
1.23
12.91
1971
7.41
1.48
14.05
1972
7.37
1.38
15.19
1973
8.13
1.96
15.76
1974
8.59
2.40
17.01
1975
8.77
2.98
18.11
1976
8.50
2.08
19.50
1977
9.08
2.30
20.67
1978
9.55
1.99
22.12
1979
9.54
2.62
23.03
1980
10.54
2.76
24.79
1981
11.59
2.58
25.68
1982
11.25
2.94
27.28
1983
11.35
2.80
28.82
1984
11.96
2.73
29.56
1985
11.83
2.29
30.96
1986
13.03
2.62
31.69
1987
13.74
2.77
32.91
1988
14.34
-
34.14
1989
14.33
-
35.42
1990
14.10
3.16
36.30
1991
15.83
3.40
36.78
1992
16.14
3.31
37.90
1993
15.18
-
38.33
1994
16.05
3.79
38.47
1995
17.63
4.22
38.77
1996
18.56
3.95
38.71
1997
17.88
4.10
38.79
1998
17.81
4.67
38.88
1999
18.47
5.81
37.67
2000
19.27
7.47
38.34
2001
20.72
-
37.93
2002
20.34
8.88
38.30
2003
20.02
9.47
38.00
2004
22.26
9.38
37.53
2005
22.85
9.22
36.90
2006
22.26
9.41
36.33
2007
22.80
9.29
36.06
2008
22.69
9.27
34.86
2009
22.39
9.10
34.27
2010
21.81
9.73
33.32
2011
21.35
10.24
32.36
2012
20.82
10.22
31.92
2013
21.91
10.86
31.02
2014
22.00
11.07
30.26
2015
20.88
11.60
29.12
2016
20.82
11.66
27.51
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