1	1996	5.1703
2	1996	4.9049
3	1996	5.3999
4	1996	4.733
1	1997	3.7444
2	1997	3.8681
3	1997	4.4579
4	1997	4.4724
1	1998	4.368
2	1998	4.8321
3	1998	6.3491
4	1998	7.0916
1	1999	6.1465
2	1999	5.811
3	1999	6.1958
4	1999	5.9943
1	2000	6.1276
2	2000	6.764
3	2000	7.4488
4	2000	7.446
1	2001	7.2377
2	2001	7.3707
3	2001	7.2659
4	2001	6.3999
1	2002	6.4637
2	2002	7.1283
3	2002	7.2838
4	2002	6.6205
1	2003	5.3846
2	2003	4.3275
3	2003	3.0766
4	2003	2.8905
1	2004	2.0919
2	2004	2.1695
3	2004	2.1654
4	2004	2.1466
1	2005	2.2359
2	2005	2.4441
3	2005	2.5619
4	2005	2.8213
1	2006	2.8979
2	2006	3.2276
3	2006	3.6033
4	2006	4.0314
1	2007	4.5996
2	2007	5.0135
3	2007	5.5438
4	2007	5.8955
1	2008	6.0456
2	2008	6.7676
3	2008	7.1347
4	2008	5.5012
1	2009	3.1494
2	2009	2.7143
3	2009	2.6156
4	2009	2.893
1	2010	3.0824
2	2010	3.0935
3	2010	3.1261
4	2010	2.9061
1	2011	3.0645
2	2011	3.2667
3	2011	3.4991
4	2011	3.3116
1	2012	3.2945
