This is some research I'd done after Katrina hit. At the time, all information wasn't available for '05, so it's not all included. Keep in mind too, the wind speeds are in knots, not MPH. I believe 1 knot = like 1.15 knots (that may not be accurate, but I believe it is).
Now, I can't say it's global warming, but something is definitely bringing more frequent storms. Just look at the past 10 years. With the exception of '97, there has been an unprecedented number of storms. I know we need to remember that we don't have records to look back on for earlier times, but IMO, something is going on. It's not simply a cycle, IMO.
You be the judge?
1853 - 1 cat 4 (winds 130)
1856 - 1 cat 4 (winds 130)
1866 - 1 cat 4 (winds 120)
1882 - 1 cat 4 (winds 120)
1894 - 1 cat 4 (winds 115)
1898 - 1 cat 4 (winds 115)
1899 - 1 cat 4 (winds 130)
1900 - 1 cat 4 (winds 125)
1910 - 1 cat 4 (winds 130)
1912 - 1 cat 4 (winds 130)
1915 - 2 cat 4's (winds 120 & 115)
1919 - 1 cat 4, (winds 120) this was 1 of 3 storms the entire year
1921 - 1 cat 4 (winds 120)
1922 - 1 cat 4 (winds 130)
1924 - 1 cat 4 (winds 115)
1928 - We see our 1st Cat 5 (winds 140)
1929 - 1 cat 4, (winds 120) 1 of 3 storms for the entire year
1930 - 1 cat 4, (winds 130) 2 storms total this year
1935 - 1 cat 5 (winds 140)
1938 - 1 cat 5 (winds 140)
1939 - 1 cat 4 (winds 115)
1943 - 1 cat 4 (winds 120)
1946 - 1 cat 4 (winds 114)
1947 - 1 cat 5 (winds 140)
1951 - 1 cat 4 (winds 115) and 1 cat 5 (winds 140)
1952 - 1 cat 4 (winds 130)
1956 - 1 cat 4 (winds 120)
1957 - 2 cat 4's (winds 125 & 135)
1958 - 2 cat 4''s (winds 115 & 115) and 1 cat 5 (winds 140)
1960 - 2 cat 5's (winds 140 & 140)
1963 - 1 cat 4 (winds 125)
1965 - 1 cat 4 (winds 135)
1967 - 1 cat 5 (winds 140)
1975 - 1 cat 4 (winds 120)
1977 - 1 cat 5 (winds 150)
1979 - 1 cat 4 (winds 115) & 1 cat 5 (winds 150)
1982 - 1 cat 4 (winds 115)
1991 - 1 cat 4 (winds 115)
1992 - 1 cat 5 (winds 150)
All these years had 11 or more storms that particular year
1870 saw 11 storms, NONE over a 3
1878 saw 12 storm, 1 cat 4 (winds 120)
1880 saw 11 storms, 2 cat 4's (winds 130 & 120)
1886 saw 12 storms, 1 cat 4 (winds 135)
1887 saw 19 storms, NONE over a 3
1893 saw 12 storms, 1 cat 4 (winds 115)
1901 saw 12 storms, NONE over a cat 2 and there was only 1 cat 2 that year
1906 saw 11 storms, 1 cat 4 (winds 115)
1916 saw 14 storms, NONE over a 3
1926 saw 11 storms, 4 cat 4's (winds were, 120, 120, 130, 115)
1932 saw 11 storms, 2 cat 4's (winds 125 & 115) & 1 cat 5 (winds 140)
1933 saw 21 storms, 2 were cat 4's (winds 120 & 130)
1934 saw 11 storms, NONE greater than a 2
1936 saw 16 storms, None hit over a cat 3
1944 saw 11 storms, 1 cat 4 (winds 120)
1945 saw 11 storms, 2 cat 4's (winds 120 & 120)
1949 saw 13 storms, 2 cat 4's (winds 115 & 130)
1950 saw 13 storms 2 cat 4's (winds 120 & 120) and 1 cat 5 (winds 160)
1953 saw 14 storms, 1 cat 4 (winds 130)
1954 saw 11 storms, 1 cat 4 (winds 120)
1955 saw 12 storms, 1 cat 4 (winds 125) & 1 cat 5 (winds 150)
1959 saw 11 storms, 1 cat 4 (winds 120)
1961 saw 11 storms, 2 cat 4's (120 & 125) & 2 cat 5's (winds 150 & 140)
1964 saw 12 storms, 4 cat 4's (135, 115, 125, 130)
1966 saw 11 storms, 1 cat 4 (winds 130)
1969 saw 18 storms, 1 cat 5 (winds 165) No other storm was over a cat 3
1971 saw 13 storms, 1 cat 5 (winds 140)
1974 saw 11 storms, 1 cat 4 (winds 130)
1978 saw 12 storms, 2 cat 4's (115 & 120)
1980 saw 11 storms, 1 cat 5 (winds 165)
1981 saw 12 storms, 1 cat 4 (winds 115)
1984 saw 13 storms, 1 cat 4 (winds 115)
1985 saw 11 storms, 1 cat 4 (winds 125)
1988 saw 12 storms, 2 cat 4's (winds 125 & 125) & 1 cat 5 (winds 160)
1989 saw 11 storms, 1 cat 4 (winds 125) & 1 cat 5 (winds 140)
1990 saw 14 storms, 1 cat 3 all the others were 2 or below
1995 saw 19 storms, 3 cat 4's (winds 120, 120, 130)
1996 saw 13 storms, 2 cat 4's (winds 125 & 120)
1998 saw 14 storms, 1 cat 4 (winds 135) & 1 cat 5 (winds 155)
1999 saw 12 storms, 5 cat 4's (winds 125, 120, 135, 130, 135)
2000 saw 15 storms, 2 cat 4's (winds 120 & 120)
2001 saw 15 storms, 2 cat 4's (winds 125, 120)
2002 saw 12 storms, 1 cat 4 (winds125)
2003 saw 16 storms, 1 cat 4 (winds 125) & 1 cat 5 (winds 145)
2004 saw 15 storms, 3 cat 4's (winds 125, 125, 125) & 1 cat 5 (winds 145)
http://weather.unisys.com/hurricane/atlantic/
Oh, and please leave a margin of error as this took a long time to put together. I didn't bother rechecking.
Edited to fix the dates so they're in order.
Edited a 2nd time to include 2005:
"05 added:
2005 saw 28 storms, 1 cat 4's (winds 130) & 4 cat 5 (winds 140, 150, 155, 160)