Months it lasted
Total % gain
10/1990-03/2000
113
417
3/2009-unknown
96
249
6/1949-8/1956
86
267
10/1974-11/1980
74
126
08/1982-08/1987
60
229
10/2002-10/2007
60
101
10/1957-12/1961
50
86
5/1962-2/1966
44
80
5/1970-1/1973
32
74
12/1987-7/1990
31
65
10/1966-11/1968
26
48
5/1947-6/1948
13
24