jaccard probe similarity metric 
fields are:

0  probe_id1
1  probe_id2
2  number of measurement specifications for probe_id1
3  number of measurement specifications for probe_id2
4  number of measurement specifications shared between the probes
5  number of measurement specifications shared between the probes with IPs in traceroutes
6  jaccard_metric 25th percentile
7  jaccard_metric 50th percentile
8  jaccard_metric 75th percentile