年份

原始数据

级比检验

1

2012

70,262

2

2013

72,962

1.0384276

3

2014

67,617

0.926742688

4

2015

63,564

0.940059453

5

2016

55,641

0.875353974

6

2017

52,925

0.951187074

7

2018

54,590

1.031459613

8

2019

56,240

1.030225316