A chart contains this table: Year Population 1971 530,854 1972 539,124 1973 545,561 1974 549,604 1975 556,496 1976 562,639 1977 565,348 1978 567,639 1979 570,075 1980 572,759 1981 575,302 1982 573,795 1983 579,164 1984 580,065 1985 579,275 1986 576,306 1987 575,242 1988 574,982 1989 576,551 1990 577,368 1991 579,644 1992 580,109 1993 579,977 1994 574,466 1995 567,397 1996 559,698 1997 550,911 1998 539,843 1999 533,329 2000 527,966 2001 522,046 2002 519,481 2003 518,459 2004 517,423 2005 514,332 2006 510,592 2007 509,055 2008 511,581 2009 516,751 2010 522,009 2011 524,999 2012 526,345 2013 527,114 2014 528,159 2015 528,117 2016 529,426 2017 528,249 2018 525,560 2019 523,427 2020 521,364 2021 520,553