1975

5,362,369

  81,330

   961

17.92

1.18

*

*

*

1976

5,575,185

  86,070

1,132

20.30

1.32

*

*

*

1977

5,689,903

  95,021

1,287

22.62

1.35

*

*

*

1978

5,859,807

105,739

1,395

23.81

1.32

*

*

*

1979

5,891,571

109,004

1,432

24.31

1.31

*

*

*

1980

5,790,653

108,491

1,262

21.79

1.16

*

*

*

1981

5,716,278

108,702

1,133

19.82

1.04

*

*

*

1982

5,590,415

111,423

   944

16.89

0.85

*

*

*

1983

5,508,392

116,132

   982

17.83

0.85

*

*

*

1984

5,401,075

121,796

1,074

19.88

0.88

*

*

*

1985

5,996,337

123,504

   977

16.29

0.79

*

*

*

1986

5,720,880

126,675

   926

16.19

0.73

*

*

*

1987

5,718,266

133,517

   852

14.90

0.64

*

*

*

1988

6,136,884

137,985

   911

14.84

0.66

37,000

611

27

1989

6,226,482

142,749

   858

13.78

0.60

43,000

687

30

1990

6,195,876

146,242

   705

11.38

0.48

42,000

675

29

1991

6,172,146

149,543

   661

10.71

0.44

28,000

454

19

1992

6,045,205

153,384

   585

  9.68

0.38

34,000

559

22

1993

6,088,155

159,888

   605

  9.94

0.38

32,000

527

20

1994

6,587,885

170,216

   670

10.17

0.39

30,000

459

18

1995

6,719,421

178,156

   648

  9.64

0.36

30,000

452

17

1996

7,012,615

182,971

   621

  8.86

0.34

33,000

467

18

1997

7,083,326

191,477

   723

10.21

0.38

31,000

436

16

1998

7,732,270

196,380

   742

  9.60

0.38

29,000

372

15

1999

7,791,426

202,688

   759

  9.74

0.37

33,000

422

16

2000

8,022,649

205,520

   754

  9.40

0.37

31,000

384

15

2001

7,857,675

209,032

   708

  9.01

0.34

29,000

374

14

2002

7,927,280

214,603

   689

  8.69

0.32

26,000

331

12

2003

7,756,888

217,917

   726

  9.36

0.33

27,000

347

12

2004

8,171,364

226,504

   761

  9.31

0.34

27,000

334

12