Use of Southpaws since 1960

Percent of Plate Appearances from right-handed pitchers vs left-handed pitchers since 1960:

Year	RHP%	LHP%
1960	73.81	26.19
1961	71.59	28.41
1962	72.42	27.58
1963	70.26	29.74
1964	69.39	30.61
1965	68.58	31.42
1966	68.76	31.24
1967	70.06	29.94
1968	71.27	28.73
1969	71.28	28.72
1970	69.57	30.43
1971	69.14	30.86
1972	69.4	30.6
1973	66.78	33.22
1974	67.45	32.55
1975	67.92	32.08
1976	69.66	30.34
1977	69.24	30.76
1978	66.71	33.29
1979	69.05	30.95
1980	68.92	31.08
1981	70.58	29.42
1982	69.92	30.08
1983	68.77	31.23
1984	69.09	30.91
1985	68.56	31.44
1986	68.67	31.33
1987	67.59	32.41
1988	69.51	30.49
1989	68.14	31.86
1990	66.13	33.87
1991	67.98	32.02
1992	69.29	30.71
1993	70.89	29.11
1994	72.1	27.9
1995	72.86	27.14
1996	74.18	25.82
1997	73.61	26.39
1998	73.58	26.42
1999	74.95	25.05
2000	75.44	24.56
2001	75.81	24.19
2002	74.78	25.22
2003	72.93	27.07
2004	72.98	27.02
2005	73.28	26.72
2006	72.92	27.08
2007	72.56	27.44
2008	71.74	28.26
2009	72.44	27.56
2010	71.88	28.12
2011	73.27	26.73

 Baseball saw its most southpaws in 1990 with 33.8% of all PA's and its least in 2001 with just 24.2%. Lefties have seen less playing time since the mid-nineties, but have been slowly on the rise over the past decade.