Table 4.

ATU dataset—contact duration trends.

Past social tie data		Present social tie data
Contact duration	Number of contact points	Contact duration	Number of contact points
5	126	5	129
10	370	10	438
15	165	15	154
20	405	20	420
25	299	25	244
30	471	30	432
35	229	35	223
40	301	40	298
45	124	45	119
50	254	50	239
55	61	55	62
60	181	60	182
65	145	65	161
70	104	70	104
75	1	75	1
80	61	80	61