Year
|
Excellent quality or compliance with guide values
|
At least sufficient quality or compliance with mandatory values
|
Poor or non-complying
|
Closed
|
Quality classification not possible
|
1990
|
36.39
|
52.4
|
11.94
|
0
|
35.66
|
1991
|
19.93
|
35.2
|
10.79
|
0.2
|
53.81
|
1992
|
22.02
|
37.42
|
14.13
|
4.07
|
44.38
|
1993
|
31.03
|
53.31
|
12
|
0.63
|
34.06
|
1994
|
33.89
|
57.75
|
11.1
|
0.82
|
30.33
|
1995
|
34.93
|
48.08
|
10.38
|
0.61
|
40.92
|
1996
|
51.18
|
68.72
|
9.76
|
0.44
|
21.08
|
1997
|
59.82
|
79.66
|
11.65
|
0.84
|
7.85
|
1998
|
63.76
|
86.64
|
7.22
|
0.55
|
5.59
|
1999
|
63.7
|
88.34
|
5.12
|
1.01
|
5.53
|
2000
|
64.77
|
90.21
|
4.99
|
0.79
|
4.01
|
2001
|
66.86
|
91.01
|
4.44
|
1.09
|
3.46
|
2002
|
64.1
|
91.06
|
3.76
|
2.86
|
2.32
|
2003
|
67.95
|
92.35
|
2.69
|
4.59
|
0.37
|
2004
|
64.16
|
86.42
|
3.64
|
5.13
|
4.81
|
2005
|
63.11
|
85.67
|
3.65
|
5.35
|
5.33
|
2006
|
63.85
|
88.78
|
4.16
|
5.01
|
2.06
|
2007
|
62.65
|
88.67
|
4.43
|
5.55
|
1.35
|
2008
|
63.66
|
91.97
|
2.84
|
4.57
|
0.62
|
2009
|
62.23
|
89.41
|
3.15
|
4.75
|
2.69
|
2010
|
60.52
|
90.22
|
2.81
|
1.59
|
5.38
|
2011
|
70.43
|
89.96
|
2.43
|
1.05
|
6.56
|
2012
|
71.92
|
90.9
|
2.31
|
0.5
|
6.29
|
2013
|
76.55
|
89.66
|
2.36
|
0.49
|
7.48
|