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% of Net Assets
46.0
40.0
39.9
32.3
23.9
20.7
20.3
18.8
17.5
17.0
14.1
13.6
13.0
11.5
11.0
10.5
9.6
9.1
7.7
7.2
6.9
6.6
4.8
Mortgage-Backed Securities Limited Partnership - Summary of Investment Portfolio (as of March 31, 2009)