Year,Value,United Kingdom (Country),Clouds,Mar-May,(%)
1940,72.727
1941,74.216
1942,71.541
1943,66.78
1944,65.541
1945,69.695
1946,67.289
1947,72.511
1948,61.012
1949,67.314
1950,67.636
1951,68.064
1952,68.177
1953,64.69
1954,71.918
1955,63.401
1956,63.981
1957,70.659
1958,71.168
1959,69.716
1960,73.066
1961,72.215
1962,67.067
1963,71.321
1964,76.653
1965,69.039
1966,73.376
1967,72.423
1968,72.337
1969,73.117
1970,69.673
1971,75.077
1972,75.933
1973,71.607
1974,69.991
1975,71.077
1976,74.602
1977,70.242
1978,70.995
1979,74.484
1980,70.414
1981,76.671
1982,70.065
1983,78.237
1984,68.027
1985,74.501
1986,72.208
1987,73.778
1988,73.259
1989,70.159
1990,65.163
1991,74.101
1992,69.625
1993,71.713
1994,73.546
1995,70.037
1996,75.803
1997,71.742
1998,75.839
1999,75.353
2000,71.961
2001,70.466
2002,70.896
2003,64.728
2004,70.055
2005,73.184
2006,71.918
2007,65.645
2008,70.719
2009,69.088
2010,69.211
2011,66.892
2012,67.988
2013,69.86
2014,75.08
2015,68.155
2016,70.681
2017,71.607
2018,73.35
2019,71.386
2020,60.529
2021,67.114
2022,68.104
2023,72.99
2024,76.655
2025,58.312