Year Number Of Units 1886 1893.00 1887 1888.00 1888 1699.00 1889 2031.00 1890 2614.00 1891 3123.00 1892 3177.00 1893 2664.00 1894 2477.00 1895 2802.00 1896 1792.00 1897 2045.00 1898 1335.00 1899 1401.00 1900 1255.00 1901 1750.00 1902 2206.00 1903 2130.00 1904 3505.00 1905 5024.00 1906 6324.00 1907 5566.00 1908 6687.00 1909 6231.00 1910 4985.00 1911 4562.00 1912 3688.00 1913 3329.00 1914 3500.00 1915 3427.00 1916 2450.00 1917 1139.00 1918 204.000 1919 600.000 1920 579.000 1921 1487.00 1922 3384.00 1923 5156.00 1924 5251.00 1925 8689.00 1926 7770.00 1927 5463.00 1928 7186.00 1929 4335.00 1930 1617.00 1931 1479.00 1932 553.000 1933 303.000 1934 343.000 1935 781.000 1936 943.000 1937 932.000 1938 1044.00 1939 1255.00 1940 1332.00 1941 2588.00 1942 786.000 1943 39.0000 1944 42.0000