1960

1,330

434

1961

1,394

455

1962

1,464

478

1963

1,592

520

1964

1,521

497

1965

1,618

529

1966

1,773

579

1967

1,945

635

1968

2,188

715

1969

2,499

816

1970

2,825

923

1971

3,233

1,060

1972

3,798

1,350

1973

4,575

1,862

1974

5,498

2,256

1975

5,997

2,529

1976

6,356

2,572

1977

6,821

2,796

1978

7,563

3,326

1979

8,585

3,948

1980

9,982

4,662

1981

11,092

5,250

1982

11,975

5,596

1983

13,608

6,440

1984

14,902

6,986

1985

14,717

6,689

1986

14,696

6,749

1987

15,641

7,427

1988

18,249

9,068

1989

20,568

10,546

1990

22,514

12,422

1991

24,203

14,010

1992

25,848

15,867

1993

28,455

17,610

1994

32,273

21,129

1995

34,755

24,520

1996

35,890

25,452

1997

38,992

26,261

1998

36,126

21,586

1999

36,123

21,313

2000

39,366

22,835

2001

36,985

20,642

2002

37,140

20,742

2003

38,506

22,102

2004

41,608

24,616

2005

44,422

26,686

2006

48,842

30,740

2007

55,009

36,500

2008

55,455

39,196

2009

51,860

35,655