| 
					 
					
					  
					
					         
								The age pyramid of US shows very clearly that 
								the population over 60 years old is already 
								decreasing after 60 years old. This category 
								represents 22.7 % of the total population. 
								As the average age 
								of death is statistically about 80 years (in 
								the absence of preventive treatments of the 
								diseases of aging). 
								 
								We can conclude that 
								22.7 % of the current population of US will be 
								statistically dead in the next 20 years and will 
								have to be replaced 
								
								
								
					in the absence of 
								preventive treatments for diseases of aging. 
					 |