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
|
36.4
|
52.4
|
11.9
|
|
35.7
|
1991
|
19.9
|
35.2
|
10.8
|
|
54
|
1992
|
22
|
37.4
|
14.1
|
|
48.4
|
1993
|
31
|
53.3
|
12
|
|
34.7
|
1994
|
33.9
|
57.7
|
11.1
|
|
31.1
|
1995
|
34.9
|
48.1
|
10.4
|
|
41.5
|
1996
|
51.2
|
68.7
|
9.8
|
|
21.5
|
1997
|
59.8
|
79.7
|
11.6
|
|
8.7
|
1998
|
63.8
|
86.6
|
7.2
|
|
6.1
|
1999
|
63.7
|
88.3
|
5.1
|
|
6.5
|
2000
|
64.8
|
90.2
|
5
|
|
4.8
|
2001
|
66.9
|
91
|
4.4
|
|
4.5
|
2002
|
64.1
|
91.1
|
3.8
|
|
5.2
|
2003
|
68
|
92.4
|
2.7
|
|
5
|
2004
|
64.2
|
86.4
|
3.6
|
|
9.9
|
2005
|
63.1
|
85.7
|
3.7
|
|
10.7
|
2006
|
63.9
|
88.8
|
4.2
|
|
7.1
|
2007
|
62.6
|
88.7
|
4.4
|
|
6.9
|
2008
|
63.7
|
92
|
2.8
|
|
5.2
|
2009
|
62.2
|
89.4
|
3.1
|
|
7.4
|
2010
|
60.5
|
90.2
|
2.8
|
|
7
|
2011
|
70.4
|
90
|
2.4
|
|
7.6
|
2012
|
71.9
|
90.9
|
2.3
|
|
6.8
|
2013
|
76.5
|
89.7
|
2.4
|
|
8
|
2014
|
78.2
|
91.3
|
2.4
|
|
6.3
|