Table 3 Identified long-term cycles by using periodogram analysis
Region
gN
VolN
Total
20 month, 48 month
20 month, 48 month
SMetro
20 month, 48 month
20 month, 48 month
5Cities
24 month, 48 month
24 month, 48 month
NMetro
20 month, 48 month
20 month, 48 month