How many Friday 13th March have there been since 1964?

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.

From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.
From 1964 to 2013, there have 7 Friday the 13ths in March as follows:

1964, 1970, 1981, 1987, 1992, 1998 and 2009.