Interval 1 (snapshot based on 2005 report) | Interval 2 (snapshot based on 2010 report) | Â | Â | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
b snap | b track |
| Birth | N | b snap | b track |
| Birth | N | Track | Min. |
10 -4 y -1 | 10 -4 y -1 | Â | Year | Â | 10 -4 y -1 | 10 -4 y -1 | Â | Year | Â | Age | Snap |
 | Span |  | Span |  | Age | ||||||
4.1 ± 1.5 | 5.3 ± 2.1 | 78 ± 8 | 1988-1997 | 24 | 6.3 ± 2.1 | 8.6 ± 2.6 | 73 ± 8 | 1993-2002 | 19 | 8 | 8 |
4.4 | 5.4 | 82 | Â | 1 | 6.8 | 8.7 | 78 | Â | 1 | Â | |
4.2 ± 1.6 | 5.6 ± 2.2 | 77 ± 8 | 1988-1996 | 22 | 6.2 ± 2.2 | 8.5 ± 2.7 | 73 ± 8 | 1993-2001 | 22 | 9 | 9 |
4.5 | 5.5 | 81 | Â | 1 | 6.9 | 8.7 | 80 | Â | 1 | Â | |
4.6 ± 1.6 | 6.0 ± 2.2 | 78 ± 7 | 1988-1995 | 21 | 6.6 ± 2.3 | 9.0 ± 2.9 | 74 ± 8 | 1993-2000 | 18 | 10 | 10 |
4.7 | 5.7 | 81 | Â | 1 | 7.0 | 8.8 | 80 | Â | 1 | Â | |
5.2 ± 1.8 | 6.7 ± 2.4 | 77 ± 8 | 1988-1994 | 17 | 7.5 ± 2.9 | 9.8 ± 3.4 | 76 ± 8 | 1993-1999 | 11 | 11 | 11 |
4.8 | 6.0 | 81 | Â | 1 | 7.0 | 8.6 | 81 | Â | 1 | Â |