年份

LX

LM

年份

LX

LM

1978

4.5799

4.6904

1993

6.8215

6.9466

1979

4.9171

5.0543

1994

7.0985

7.0528

1980

5.1996

5.2993

1995

7.3051

7.1860

1981

5.3941

5.3945

1996

7.3202

7.2358

1982

5.4081

5.2622

1997

7.5109

7.2610

1983

5.4040

5.3655

1998

7.5159

7.2459

1984

5.5661

5.6135

1999

7.5752

7.4128

1985

5.6113

6.0462

2000

7.8208

7.7191

1986

5.7346

6.0617

2001

7.8865

7.7979

1987

5.9774

6.0687

2002

8.0883

7.9901

1988

6.1637

6.3148

2003

8.3853

8.3255

1989

6.2642

6.3825

2004

8.6883

8.6327

1990

6.4312

6.2795

2005

8.9385

8.7947

1991

6.5780

6.4582

2006

9.1788

8.9765

1992

6.7445

6.6920

2007

9.4074

9.1653