Application of Gray Markov Model to Prediction of Accidents Deaths in Coal Mining

Table 2

Prediction and comparison of the coal mine accident deaths from 1990 to 2010 in China.

Year	Actual value	Amended prediction value	Actual value/prediction value
1990	7185
1991	6269	6501	96%
1992	5854	6310	93%
1993	5152	6125	84%
1994	6574	5944	111%
1995	6222	5766	108%
1996	6496	5565	88%
1997	6141	5425	113%
1998	6304	6823	93%
1999	6478	6568	119%
2000	5798	6323	118%
2001	5670	6087	111%
2002	6995	5860	114%
2003	6702	5643	119%
2004	6027	5433	111%
2005	5986	5233	114%
2006	4746	5040	94%
2007	3786	3970	95%
2008	2631	3846	69%
2009	2631	3725	71%
2010	2433	3592	68%