1978

1,239,464

5,097,852

24.3%

6,405,000

19.4%

1980

1,175,292

5,429,071

21.6%

6,510,000

18.1%

1982

1,601,890

5,506,794

29.1%

6,554,000

24.4%

1984

1,140,634

5,668,050

20.1%

6,577,000

17.3%

1986

1,168,617

5,675,196

20.6%

6,633,000

17.6%

1988

1,118,006

5,768,080

19.4%

6,791,000

16.5%

1990

1,032,939

5,817,360

17.8%

6,837,000

15.1%

1992

1,461,562

5,956,403

24.5%

6,884,000

21.2%

1994

1,420,135

6,068,536

23.4%

6,973,000

20.4%

1996

1,310,293

6,502,772

20.1%

7,067,000

18.5%

1998

1,375,593

6,889,429

20.0%

7,266,000

18.9%

2000

1,226,096

6,743,128

18.2%

7,358,000

16.7%

2002

1,722,869

6,807,837

25.3%

7,400,000

23.3%

2004

1,384,243

6,916,340

20.0%

7,541,000

18.4%

2006

1,282,203

7,113,246

18.0%

7,581,000

16.9%