Beginning in the early 1960s, a series of serious bottlenecks began to impede development. Bottlenecks were pervasive and generally were created by the lack of arable land, skilled labor, energy, and transportation, and deficiencies in the extractive industries. Moreover, both land and marine transportation lacked modern equipment and modes of transportation. The inability of the energy and extractive industries as well as of the transportation network to supply power and raw materials as rapidly as the manufacturing plants could absorb them began to slow industrial growth.