More than 30 HRs at home in 2013

Grant Bisbee at McCovey Chronicles predicts that the Giants will hit a few more homers this year at home. He notes that the 30% of the ratio to total HRs (103 last year) was historically low and probably an aberration.Here are the lowest HR totals for the Giants since they moved to SF, followed by the percentage of team homers -- 

1981 (strike year)	63	44%
1980	80	30%
1975	84	43%
1976	85	52%
1974	93	54%
2008	94	48%
2012	103	30%
1992	105	54%
1968	108	56%
1984	112	49%