data chinaPopulation and Vital Statistics Reprot ( various years ), ( 5 ) U.S. Census Bureau: International Database, and ( 6 ) Secretariat of the Pacific Community: Statistics and DemographyThe data of annual, quarterly, and monthly frequencies are updated semiannually. The file readme describes the layout of the current data files.. Since the late 1990s, China's investment share of gross domestic product (GDP)