1997
4.6
6.7
6.8
4.7
5.8
6.1
4.5
4.6
5.6
5.2
6.2
6.8
6.3
7.7
5.5
6.1
4.7
6.5
5.5
5.9
7.5
6.8
7.1
4.6
7.5
5.9
7.1
7
6
6.6
7.6
7.1
5.1
5.1
6.8
5.6
6.7
6.3
5.8
6.8
6.9
6.4
4.8
7
6.1
5.7
6.7
6
6.6
6.7
4.7
5.3
4.6
5.5
7
4.9
6.9
5.9
5.6
5.3
5.5
7
6.7
5.3
6.7
5.8
7
5
3.7
3.9
6.9
5.7
6.1
4.4
4.4
4.6
6.5
7.9
4
6.1
6.1
4.7
6.7
7.7
6.7
7.4
7.2
5.6
6.7
6.9
6.5
4.2
5.6
6.4
6.1
3
7.3
5.6
6.8
5.6
