年份

实际值(对数值)

预测值

误差值

误差百分比

1987

4.335459

4.337258

-0.0018

-0.04%

1988

4.449101

4.45448

-0.00538

-0.12%

1989

4.587108

4.472201

0.114907

2.50%

1990

4.620945

4.664167

-0.04322

-0.94%

1991

4.690797

4.76223

-0.07143

-1.52%

1992

4.773731

4.836098

-0.06237

-1.31%

1993

5.115836

4.993477

0.122358

2.39%

1994

5.344199

5.395114

-0.05092

-0.95%

1995

5.515443

5.565141

-0.0497

-0.90%