1978

14,963

15,010

1.00

1998

14,323

15,571

1.09

1979

14,973

14,848

0.99

1999

14,279

15,637

1.10

1980

14,954

14,638

0.98

2000

14,183

15,630

1.10

1981

14,927

14,516

0.97

2001

14,120

15,571

1.10

1982

14,884

14,475

0.97

2002

13,952

15,464

1.11

1983

14860

14,399

0.97

2003

13,698

15,242

1.11

1984

14,809

14,422

0.97

2004

13,603

15355

1.13

1985

14,708

14,363

0.98

2005

13,567

15,549

1.15

1986

14,647

14,420

0.99

2006

13,536

15,215

1.12

1987

14,584

14,496

0.99

2007

13,532

15,040

1.11

1988

14,535

14,487

1.00

2008

13,530

15,369

1.14

1989

14,504

14,655

1.01

2009

13,538

15,559

1.15

1990

14,502

14,836

1.02

2010

13,527

15,679

1.16

1991

14,512

14,959

1.03

2011

13,524

15,986

1.18

1992

14,509

14,901

1.03

2012

13,516

16183

1.20

1993

14,480

14774

1.02

2013

13,516

16,345

1.21

1994

14,447

14,824

1.03

2014

13506

16,497

1.22

1995

14,403

14,988

1.04

2015

13,500

16,683

1.24

1996

14,363

15,238

1.06

2016

13,492

16,694

1.24

1997

14,349

15,397

1.07

2017

13,486

16,633

1.23