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Table 2 Overall Mortality Rates across all cities by year

From: Particulate air pollution and survival in a COPD cohort

Year

Mortality rates

1986

0.20

1987

0.18

1988

0.16

1989

0.15

1990

0.14

1991

0.13

1992

0.13

1993

0.12

1994

0.12

1995

0.13

1996

0.12

1997

0.12

1998

0.12

1999

0.12