Since then, however, TFP growth has turned positive, although it has been slower than in other country groups. In the island LDC subgroup, TFP has grown very slowly since the 1960s. It has alternated between periods of positive and negative growth, with a performance similar to that of partial productivity measures examined above. The former include the relatively positive agricultural productivity performance of mixed exporters and manufactures exporters, as well as fuel exporters (chart 2.8B).