Year kt 1960 142809.0448326734 1961 151177.45597136987 1962 157623.19568860458 1963 173165.8236289535 1964 187266.03178614617 1965 203671.08241827055 1966 219327.24513217236 1967 216331.69345928173 1968 255265.05476076278 1969 257516.12373847916 1970 303096.9666199483 1971 326545.62810266 1972 325827.5871818105 1973 363773.62701124494 1974 370680.9163602759 1975 389764.0652505835 1976 408371.4569663406 1977 451436.29158121743 1978 476585.34444704535 1979 525429.7477009075 1980 530834.8778228852 1981 548715.4182997455 1982 587181.2668939667 1983 620845.4921524457 1984 638364.8095893692 1985 669267.0001400405 1986 667667.9274144676 1987 683394.3451287793 1988 738357.5142664448 1989 778092.0486594676 1990 780933.3762297003 1991 829296.5996826397 1992 898801.1595505088 1993 880954.9668611845 1994 870667.5499903343 1995 917190.1464276712 1996 950924.0716961478 1997 982442.8098737178 1998 1018898.0411379769 1999 1068967.1374377424 2000 1133908.0609786117 2001 1137348.2025204503 2002 1120107.1519999998 2003 1143436.6059999994 2004 1185603.439 2005 1187169.2479999997 2006 1201881.2519999994 2007 1243762.0589999994 2008 1335323.3819999993 2009 1424358.1419999995 2010 1444343.292 2011 1477005.2609999995 2012 1528544.9459999995 2013 1581577.0999999999 2014 1677161.1219999997 2015 1741348.29 2016 1808340.713