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

5,941

2,505

1976

6,389

2,586

1977

6,898

2,828

1978

7,576

3,332

1979

8,610

3,959

1980

10,394

4,854

1981

11,584

5,483

1982

12,345

5,769

1983

13,701

6,484

1984

14,658

6,872

1985

14,226

6,466

1986

14,305

6,570

1987

15,592

7,404

1988

17,911

8,900

1989

20,039

10,275

1990

21,950

12,110

1991

23,794

13,773

1992

25,131

15,427

1993

28,440

17,601

1994

31,525

20,640

1995

33,743

23,806

1996

35,400

25,105

1997

37,332

25,143

1998

35,015

20,922

1999

35,409

20,891

2000

39,723

23,043

2001

37,222

20,775

2002

37,971

21,206

2003

38,451

22,070

2004

42,581

25,191