世界经济

指标/年份	USA_人口密度(每公里土地面积人数)
1960	-
1961	20.06
1962	20.37
1963	20.66
1964	20.95
1965	21.21
1966	21.46
1967	21.70
1968	21.91
1969	22.13
1970	22.39
1971	22.67
1972	22.92
1973	23.14
1974	23.35
1975	23.58
1976	23.81
1977	24.05
1978	24.30
1979	24.57
1980	24.81
1981	25.05
1982	25.29
1983	25.53
1984	25.75
1985	25.98
1986	26.22
1987	26.45
1988	26.70
1989	26.95
1990	27.25
1991	27.62
1992	28.01
1993	28.38
1994	28.73
1995	29.07
1996	29.41
1997	29.77
1998	30.12
1999	30.47
2000	30.80
2001	31.10
2002	31.39
2003	31.66
2004	31.96
2005	32.25
2006	32.57
2007	32.88
2008	33.24
2009	33.54
2010	33.82
2011	34.09
2012	34.36
2013	34.62
2014	34.90
2015	35.18
2016	35.46
2017	35.70
2018	35.91
2019	36.10
2020	36.25
2021	36.31
2022	36.51
2023	36.82
2024	-