1981

923,000

15,437

14,248,351,000

$1,943,229,000

1982

940,000

15,455

14,527,700,000

$1,941,197,000

1983

948,000

15,541

14,732,868,000

$1,945,068,000

1984

978,000

15,636

15,292,008,000

$1,988,136,000

1985

1,041,000

16,102

16,762,182,000

$2,077,806,000

1986

1,070,000

16,095

17,221,650,000

$2,058,238,000

1987

1,061,000

16,897

17,927,717,000

$2,083,001,000

1988

1,083,000

17,181

18,607,023,000

$2,072,368,000

1989

1,104,000

17,591

19,420,464,000

$2,439,058,000

1990

1,135,000

18,461

20,953,235,000

$2,555,641,000

1991

1,155,000

18,534

21,406,770,000

$2,439,429,000

1992

1,158,000

19,080

22,094,640,000

$2,610,355,000

1993

1,210,000

18,948

22,927,080,000

$2,663,208,000

1994

1,235,000

20,439

25,242,165,000

$2,967,085,000

1995

1,254,000

20,211

25,344,594,000

$3,079,739,000

1996

1,276,000

20,267

25,860,692,000

$3,714,624,000

1997

1,400,000

19,829

27,760,600,000

$3,629,762,000

1998

1,420,000

19,442

27,607,640,000

$4,290,392,000