"Figure 3: Two-children families have consistently been the most common family size over time","" "Estimated family size distribution on completion of childbearing, 1920 to 1973 cohorts, England and Wales","" "","" "Notes","1. Percentages may not sum to 100% because of rounding." "Unit","Percentages" "","" "Year of birth of woman","4 or more","3","2","1","0 (Childless)" "1920","15","16","27","21","21" "1921","15","16","28","22","18" "1922","15","16","28","22","18" "1923","16","17","28","23","16" "1924","16","16","28","22","17" "1925","16","17","28","22","17" "1926","17","17","29","21","16" "1927","18","17","28","21","16" "1928","18","18","29","20","15" "1929","19","18","29","19","15" "1930","20","19","30","18","13" "1931","20","19","30","18","14" "1932","20","19","30","17","14" "1933","20","20","31","16","13" "1934","20","21","32","16","11" "1935","20","21","32","15","12" "1936","20","22","32","15","12" "1937","19","22","33","14","12" "1938","19","22","34","14","11" "1939","18","22","35","13","12" "1940","18","22","36","13","11" "1941","17","22","37","13","11" "1942","16","22","38","13","11" "1943","15","21","40","12","12" "1944","13","21","42","13","11" "1945","12","21","43","14","10" "1946","12","21","44","14","9" "1947","11","20","43","14","12" "1948","11","20","44","13","11" "1949","11","20","44","13","13" "1950","10","20","44","13","14" "1951","10","19","43","13","14" "1952","10","19","44","12","14" "1953","10","19","43","12","15" "1954","10","19","42","12","16" "1955","11","19","41","13","16" "1956","11","19","41","12","17" "1957","11","20","40","12","17" "1958","11","19","39","13","18" "1959","11","20","39","12","19" "1960","11","20","38","12","19" "1961","10","20","38","12","20" "1962","10","20","37","13","20" "1963","10","20","38","12","20" "1964","10","19","38","12","20" "1965","10","19","38","13","20" "1966","10","18","38","14","20" "1967","10","18","37","15","19" "1968","10","18","37","17","18" "1969","10","18","37","17","18" "1970","10","17","37","18","17" "1971","10","17","37","18","18" "1972","10","17","37","18","18" "1973","10","16","37","18","19"