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Year
Repub.
Democrat
Indep.
Other
1867 40 0    
1868 38 10    
1869 38 2    
1870 29 10   1 Labor Reform
1871 34 5   1 Labor Reform
1872 35 0   5 Democratic & Labor Reform
1873 39 1    
1874 25 11 4  
1875 24 15 1  
1876 30 9 1  
1877 33 7    
1878 35 5    
1879 35 5    
1880 32 5   3 Other
1881 35 5    
1882 36 4    
1883 22 18    
1884 25 14   1 Other
1885 34 5   1 Other
1886 28 11   1 Other
1887 25 14    
1888 30 10    
1889 33 7    
1890 29 11    
1891 20 20    
1892 25 14 1  
1893 30 10    
1894 33 7    
1895 36 4    
1896 33 7    
1897 35 5    
1898 33 7    
1899 33 7    
1900 31 9    
1901 31 9    
1902 33 7    
1903 31 9    
1904 31 9    
1905 34 6    
1906 31 9    
1907 28 12    
1908 31 9    
1909 34 6    
1910 33 7    
1911 26 14    
1912 26 14    
1913 26 14    
1914 21 17   2 Progressive
1915 28 12    
1916 34 5   1 Labor Democrat
1917 34 6    
1918 33 7    
1919 30 10    
1920 33 7    
1921-22 35 5    
1923-24 33 7    
1925-26 34 6    
1927-28 35 5    
1929-30 31 9    
1931-32 30 10    
1933-34 26 14    
1935-36 21 19    
1937-38 27 13    
1939-40 28 12    
1941-42 25 15    
1943-44 26 14    
1945-46 23 17    
1947-48 24 16    
1949-50 20 20    
1951-52 22 18    
1953-54 25 15    
1955-56 21 19    
1957-58 21 19    
1959-60 16 24    
1961-62 14 26    
1963-64 12 28    
1965-66 13 27    
1967-68 14 26    
1969-70 13 27    
1971-72 10 30    
1973-74 7 33    
1975-76 7 33    
1977-78 7 33    
1979-80 6 34    
1981-82 7 32   1 Other
1983-84 8 32   1 Vacancy
1985-86 8 32    
1987-88 9 31    
1989 8 32    
1990 8 32    
1991 16 24    
1992 15 24   1 Vacancy
1993 9 31    
1994 9 31    
1995 10 30    
1996 10 28   2 Vacancies
1997 7 33    
1998 7 33    
1999 7 32   1 vacancy
2000 7 33    
2001 6 34    
2002 7 32   1 vacancy
2003 6 34    
2004 6 33   1 vacancy
2005 6 34    
2006 6 34    
2007 5 34   1 vacancy
2008 5 35    

Sources: Dalton, Cornelius. Leading the Way : A History of the General Court, 1629-1980.
Center for Leadership Studies. The Massachusetts Political Almanac.

Note: Vacancies means the the seats were empty for part of the session.
 
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