1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

19,865

20,116

19,861

21,370

22,543

24,253

24,273

24,295

20,785

17,217

15,058

11,970

9,443

7,438

5,720

4,951

4,514

4,361

4,197

4,150

3,817

3,318

3,299

3,191

2,832

2,833

2,886

2,773

2,519

2,084

2,084

18,543

17,887

18,960

21,316

23,100

24,251

23,588

22,926

20,054

18,779

14,996

11,068

7,747

4,684

3,005

1,960

1,389

1,229

1,117

1,192

1,230

1,175

1,191

1,385

2,010

2,327

2,091

2,289

1,941

1,859

1,822

1,878

2,326

2,074

2,251

1,778

2,285

2,444

2,407

2,438

1,983

2,070

1,945

2,272

2,191

2,420

2,514

2,323

2,451

2,552

2,850

2,689

2,558

2,710

2,356

2,354

2,356

2,156

1,960

1,360

839

543

992

652

636

587

461

391

294

308

307

217

115

62

55

49

60

28

57

162

184

116

108

75

43

145

102

34

7

11

8

-

-

21,413

20,865

21,670

24,154

25,339

26,927

26,326

25,641

22,799

20,979

17,181

13,075

10,074

6,924

5,485

4,502

3,769

3,842

3,853

4,158

4,027

3,808

3,944

3,886

4,466

4,717

4,254

4,260

3,309

2,698

2,365