What can you conclude from the line graph?
year 1976 1980 1984 1988 1992 1996
percent 53.5 52.8 53.3 50.3 55.1 48.9

The later it happens, the bigger the fluctuations are. It was at 53.5 percent level at the begining, then it slightly dropped and again gained nearly as much as at the begining. Then it dropped very noticeably, then it broke a record in terms of both increase and max. percentage level, then it again broke a record, but this time in terms of decrease and min. percentage level. That's more less what I concluded from the line graph :)