The Census' official definition of money income excludes food stamps and the EITC, for example, while CBO includes it. Between 1979 and 2011, gross median household income, adjusted for inflation, rose from $59,400 to $75,200, or 26.5%. This compares with the Census' growth of 10%.
It takes a long time for the tiny coral polyps to create an entire reef. Coral formations grow an average of 1 to 8 inches per year. While ancestors of today's coral date back 240 million years, today's reefs began growing more than 50 million years ago, although most reefs are about 5,000 to 10,000 years old.oral Types. Coral comes in two types -- hard corals and soft corals. Hard corals grow in colonies and are responsible for the unique rock-like formations associated with coral reefs. Soft corals look like plants.
Coral reefs are formed when one coral stays plotted down in one area. After time, that coral dies, and another attaches to that dead one and lives there. This happens over andâ¦ over to form coral reefs.   Coral reefs are built mainly from corals and sea anemones. Since corals are colonial animals (meaning, they grow in colonies), their skeletons grow together in large masses. These skeletons build up a chain of large stony structures called a reef.