Years	ICD	Codes used	Data source
1900–1909	1	47, 64–66, 77–86, 142	A
1910–1920	2	47, 64–66, 77–85, 142	A
1921–1929	3	51, 74, 75, 83, 87–90, 91b,c, 92–96, 151	A
1930–1938	4	56, 82, 90–95, 97–103	A
1939–1948	5	58, 83, 90–103	A
1949–1957	6	330–334, 400–468	A (1949–53); B (1954–57)
1958–1967	7	330–334, 400–468	B (1958–59); C (1960–67)
1968–1978	8	390–448	D
1979–1998	9	390–448	E
1999–2006	10	I00–I78	F
Data sources:
A	US Department of Health, Education, and Welfare (1956)
B	National Center for Health Statistics (2005)
C	National Center for Health Statistics (2004a)
D	National Center for Health Statistics (2004b)
E	National Center for Health Statistics (2000)
F	National Center for Health Statistics (2009)