Table 1 Total population and birth, death, and natural growth rate per 1000 residents during 1972 and 1981 in Tangshan city.

From: Incidence rate of schizophrenia after the Tangshan earthquake in China: a 44-year retrospective birth cohort study

Year

Total population

Birth rate

Birth population

Death rate

Natural growth rate

1972

5,406,186

23.0

124,342

7.4

15.6

1973

5,475,588

18.7

102,393

6.1

12.6

1974

5,520,995

14.5

80,054

6.7

7.8

1975

5,569.355

14.7

81,870

7.0

7.7

1976

5,407,751

14.9

80,575

44.1

−29.2

1977

5,487,908

16.8

92,197

6.4

10.4

1978

5,584,723

18.6

103,876

5.9

12.7

1979

5,650,905

17.8

100,586

5.9

11.9

1980

5,730,658

16.6

95,129

6.1

10.5

1981

5,821,476

20.3

118,176

5.9

14.4