2 0.068995
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4 0.164639
5 0.234950
6 0.322793
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9 0.752163
10 0.955217
11 1.190432
12 1.519409
13 1.808177
14 2.200211
15 2.654874
16 3.265984
17 3.824895
18 4.413004
19 5.303216
20 6.310782
21 7.038971