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PIR

1987

10,623

620

17.1

1988

12,585

717

17.6

1989

14,954

882

16.9

1990

20,580

1,044

19.7

1991

19,655

1,295

15.2

1992

18,803

1,501

12.5

1993

18,285

1,630

11.2

1994

18,507

1,861

9.9

1995

18,507

2,079

8.9

1996

19,285

2,334

8.3

1997

20,284

2,477

8.2

1998

17,323

2,274

7.6

1999

19,488

2,361

8.3

2000

20,303

2,536

8.0

2001

24,226

2,783

8.7

2002

31,685

2,980

10.6

2003

34,911

3,115

11.2

2004

34,555

3,267

10.6

2005

37,692

3,401

11.1

2006

46,781

3,574

13.1

2007

48,450

3,820

12.7

2008

50,000

4,023

12.4

2009

51,300

4,118

12.5

2010

50,171

4,358

11.5