Farming in South Africa is one of the most dangerous professions in the world. The murder rate for farmers is 313 per 100 000 per year according to a statement in July 2007 by Freedom Front spokesperson, Pieter Groenewald (Source) - about eight times higher than the reported national average murder rate. Farm attacks in SA are also 7 times higher than any other country in the world. Since 1994 more than 1600 farmers were killed. White people are in most cases the victims - there is, however, a perception that whites are the only victims.
A very comprehensive report about farm attacks was released by the South African Police Service in July 2003. The entire report can be found here: ISS. One of the findings was that there were 1398 farm attacks in 2001. 61.6% of the victims were white, 33.3% black, 4.4% colored and 0.7% Indian. However, the chance that a white farmer will be injured/murdered during a farm attack is considerably higher than any other race group.
The political parties, the DA and FF+ reaction to the report can be found here: News24. The trade union, Solidarity also released a report on farm attacks which can be read here: SolidaritySA.
In 2002, Colonel Schoeman (who studied farm attacks for years at that point of time), senior staff officer of the chief of joint operations, said that black farmers are 80% more likely to be attacked and that the number of black victims are increasing.
The 2007 crime figures for farm attacks showed a small decline in the amount of farm murders.