Table 1.

Summary statistics of the survey subsets

	HRS	SAGE			SHARE (Northern Europe)	SHARE (Continental Europe)	SHARE (Southern Europe)
Measurements	United States	China	India	Mexico	Denmark, England, Ireland, Sweden	Austria, Belgium, Czech Republic, France, Germany, Netherlands, Poland, Switzerland	Greece, Italy, Spain
Year	2006/07	2007–2009	2007–2009	2007–2009	2006/07	2006/07	2006/07
Sample size	17,995	13,367	7,150	2,306	4,736	14,948	6,153
Females, %	58.3	53.1	49.4	60.5	53.4	55.2	54.6
Birth cohorts	1901–1956	1910–1959	1909–1957	1904–1959	1907–1957	1903–1957	1905–1957
None of the  words recalled, %	0.7	1.3	1.0	2.8	0.4	1.9	2.9
All words  immediately  recalled, %	0.7	0.4	0	0	0.9	0.4	0.5