Epidemic infection rate
Year
orginal data(%)
standardized value
1988
   
1989
   
1990
   
1991
0.015
100.00
1992
0.020
99.60
1993
0.023
99.31
1994
0.025
99.15
1995
0.028
98.82
1996
0.025
99.14
1997
0.027
98.98
1998
0.025
99.14
1999
0.081
94.10
2000
0.105
91.95
2001
0.109
91.60
2002
0.141
89.34
2003
0.105
91.34
2004
0.129
90.16
2005
0.129
90.16