[[1940, 0.1943], [1941, 0.238], [1942, 0.1481], [1943, 0.1529], [1944, 0.3447], [1945, 0.2063], [1946, 0.2083], [1947, 0.2532], [1948, 0.1923], [1949, 0.2253], [1950, 0.1139], [1951, 0.2478], [1952, 0.2293], [1953, 0.3068], [1954, 0.1096], [1955, 0.0925], [1956, 0.0325], [1957, 0.2812], [1958, 0.3472], [1959, 0.3124], [1960, 0.2668], [1961, 0.3421], [1962, 0.2818], [1963, 0.3187], [1964, 0.1071], [1965, 0.1703], [1966, 0.2474], [1967, 0.2627], [1968, 0.199], [1969, 0.3303], [1970, 0.3031], [1971, 0.1499], [1972, 0.2856], [1973, 0.3867], [1974, 0.1134], [1975, 0.1363], [1976, 0.0683], [1977, 0.3544], [1978, 0.2953], [1979, 0.4527], [1980, 0.5816], [1981, 0.6155], [1982, 0.4165], [1983, 0.6102], [1984, 0.3991], [1985, 0.3591], [1986, 0.4461], [1987, 0.6021], [1988, 0.6349], [1989, 0.5157], [1990, 0.7485], [1991, 0.6917], [1992, 0.4603], [1993, 0.5062], [1994, 0.544], [1995, 0.7184], [1996, 0.59], [1997, 0.7133], [1998, 0.9003], [1999, 0.6308], [2000, 0.6294], [2001, 0.7953], [2002, 0.8862], [2003, 0.8722], [2004, 0.8076], [2005, 0.9737], [2006, 0.9217], [2007, 0.9161], [2008, 0.7847], [2009, 0.9149], [2010, 1.0094], [2011, 0.8695], [2012, 0.9196], [2013, 0.9468], [2014, 0.9877], [2015, 1.1361], [2016, 1.3181], [2017, 1.2229], [2018, 1.1439], [2019, 1.2795], [2020, 1.3104], [2021, 1.1549], [2022, 1.1814], [2023, 1.4822], [2024, 1.5988], [2025, 1.4709]]