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.
Different species of coral grow at different rates depending on water temperature, salinity, turbulence, and the availability of food. The massive corals are the slowest growing species, adding between 5 and 25 millimeters (0.2â1 inch) per year to their length.Branching and staghorn corals can grow much faster, adding as much as 20 centimeters (8 inches) to their branches each year. Coral reefs grow best in warm water (70â85Â° F or 21â29Â° C).Corals prefer clear and shallow water, where lots of sunlight filters through to their symbiotic algae. It is possible to find corals at depths of up to 300 feet (91 meters), but reef-building corals grow poorly below 60â90 feet (18â27 meters).ranching and staghorn corals can grow much faster, adding as much as 20 centimeters (8 inches) to their branches each year. Coral reefs grow best in warm water (70â85Â° F or 21â29Â° C). Corals prefer clear and shallow water, where lots of sunlight filters through to their symbiotic algae.