← All namesBertram
Raw counts
| Year | Count |
|---|
| 1910 | 20 |
| 1911 | 26 |
| 1912 | 52 |
| 1913 | 52 |
| 1914 | 80 |
| 1915 | 115 |
| 1916 | 122 |
| 1917 | 160 |
| 1918 | 151 |
| 1919 | 135 |
| 1920 | 136 |
| 1921 | 164 |
| 1922 | 165 |
| 1923 | 181 |
| 1924 | 177 |
| 1925 | 153 |
| 1926 | 139 |
| 1927 | 139 |
| 1928 | 135 |
| 1929 | 94 |
| 1930 | 112 |
| 1931 | 111 |
| 1932 | 96 |
| 1933 | 93 |
| 1934 | 72 |
| 1935 | 61 |
| 1936 | 48 |
| 1937 | 55 |
| 1938 | 45 |
| 1939 | 56 |
| 1940 | 18 |
| 1941 | 37 |
| 1942 | 55 |
| 1943 | 22 |
| 1944 | 12 |
| 1945 | 15 |
| 1946 | 29 |
| 1947 | 57 |
| 1948 | 61 |
| 1949 | 43 |
| 1950 | 29 |
| 1951 | 75 |
| 1952 | 24 |
| 1953 | 67 |
| 1954 | 45 |
| 1955 | 69 |
| 1956 | 34 |
| 1957 | 34 |
| 1958 | 41 |
| 1959 | 8 |
| 1960 | 13 |
| 1961 | 5 |
| 1962 | 11 |
| 1963 | 13 |
| 1964 | 20 |
| 1965 | 25 |
| 1966 | 43 |
| 1967 | 40 |
| 1968 | 22 |
| 1969 | 32 |
| 1970 | 31 |
| 1971 | 20 |
| 1972 | 11 |
| 1973 | 10 |
| 1974 | 10 |
| 1979 | 7 |
| 1987 | 6 |
| 1990 | 5 |
| 1991 | 6 |