1960

1,306

427

1961

1,368

447

1962

1,436

469

1963

1,554

508

1964

1,474

482

1965

1,567

512

1966

1,718

561

1967

1,895

619

1968

2,145

701

1969

2,458

803

1970

2,798

914

1971

3,237

1,061

1972

3,807

1,354

1973

4,677

1,903

1974

5,655

2,321

1975

5,943

2,506

1976

6,392

2,587

1977

6,902

2,829

1978

7,581

3,334

1979

8,618

3,963

1980

10,405

4,859

1981

11,598

5,490

1982

12,366

5,779

1983

13,725

6,495

1984

14,696

6,890

1985

14,267

6,484

1986

14,345

6,588

1987

15,613

7,414

1988

17,975

8,932

1989

20,040

10,275

1990

21,915

12,091

1991

23,785

13,768

1992

25,067

15,388

1993

28,360

17,552

1994

31,575

20,672

1995

33,897

23,915

1996

35,552

25,212

1997

37,498

25,255

1998

35,115

20,982

1999

35,371

20,869

2000

39,683

23,019

2001

37,088

20,700

2002

37,885

21,158

2003

39,494

22,669

2004

44,478

26,314

2005

47,308

28,420

2006

50,737

31,932

2007

56,349

37,389

2008

55,041

38,904

2009

51,656

35,515