Bar charts are proportional to record count, and scaled.

Publication Year	Count	Percent
1909	1	1.7
1910	1	1.7
1911	0	0.0
1912	0	0.0
1913	0	0.0
1914	2	3.4
1915	1	1.7
1916	0	0.0
1917	0	0.0
1918	0	0.0
1919	0	0.0
1920	1	1.7
1921	3	5.2
1922	2	3.4
1923	5	8.6
1924	3	5.2
1925	2	3.4
1926	2	3.4
1927	0	0.0
1928	3	5.2
1929	1	1.7
1930	1	1.7
1931	0	0.0
1932	0	0.0
1933	2	3.4
1934	0	0.0
1935	2	3.4
1936	2	3.4
1937	2	3.4
1938	3	5.2
1939	6	10.3
1940	4	6.9
1941	3	5.2
1942	0	0.0
1943	0	0.0
1944	0	0.0
1945	1	1.7
1946	0	0.0
1947	0	0.0
1948	0	0.0
1949	0	0.0
1950	3	5.2
1951	0	0.0
1952	0	0.0
1953	0	0.0
1954	1	1.7
1955	1	1.7

Items: 47