Table 2. Number of National Pools Analyzed According to Population Density within Regions and Periods.

	PD < 25 (N = 46)	PD_25–90 (N = 47)	PD_90–200 (N = 55)	PD_200–330 (N = 20)	PD_330–2000 (N = 19)	PD > 2000 (N = 2)	Overall (N = 189)
Region
Africa	6 (13.0%)	12 (25.5%)	10 (18.4%)	2 (10.0%)	2 (10.5%)		32 (16.9%)
Asia	8 (17.4%)	10 (20.8%)	15 (27.8%)	4 (20.0%)	4 (21.1%)	2 (100%)	43 (22.8%)
CEE	2 (4.3%)	13 (27.1%)	18 (33.3%)				33 (17.5%)
GRULAC	12 (26.1%)	4 (8.3%)	2 (3.7%)	4 (20.0%)	4 (21.1%)		26 (13.8%)
WEOG	18 (39.1%)	8 (16.7%)	10 (18.5%)	10 (50.0%)	9 (47.4%)		55 (29.1%)
Period
1985–1989	4 (8.7%)	2 (4.2%)	5 (9.3%)	3 (15.0%)	2 (10.5%)		16 (8.5%)
1990–1994	4 (8.7%)	3 (6.3%)	8 (14.8%)	3 (15.0%)	1 (5.3%)		19 (10.1%)
2000–2004	7 (15.2%)	8 (16.7%)	6 (11.1%)	3 (15.0%)	2 (10.5%)	1 (50.0%)	27 (14.3%)
2005–2009	7 (15.2%)	7 (14.6%)	16 (29.6%)		4 (21.1%)	1 (50.0%)	35 (18.5%)
2010–2014	13 (28.3%)	12 (25.0%)	8 (14.8%)	2 (10.0%)	6 (31.6%)		41 (21.7%)
2015–2019	11 (23.9%)	15 (31.9%)	12 (21.8%)	9 (45.0%)	4 (21.1%)		51 (27.0%)