Table 1.

Result for R${}_{\max }$ for different countries.

Countries	$\sigma$ = 1	$\sigma$ = 2
United Kingdom	0.39978	0.20031
Australia	0.40018	0.20071
Italy	0.39927	0.19980
Spain	0.40136	0.20190
Canada	0.40018	0.20098
United States	0.40126	0.20180