The line graph illustrates the proportion of income gap between genders in five countries at ten-year from 1978 to 2008.
Overall, there was a decline in the percentage of income gap in Japan, US, France and UK, while an opposite trend can be seen in the figure for difference income in Australia. In addition, Australia was the only country had the income gap between men and women increased in five countries.
The share of the difference income in genders in Japan started at 48%, after which it experienced a significant decrease to about 41% in 2008. Similarly, the figure for the income gap between men and women in US, Uk decreased from 33% and 29% in 1978 to approximately 28% and 27% respectively.
18% was the proportion of income gap genders in Australia in 1978, with a subsequent fluctuatios and surpass the figure for France in 1998 and ending the period at 24%. By contrast, the figure for France dropped from 19% to 17% in three decades. 
The line graph illustrates the proportion of  
income
  gap
 between genders in five countries at ten-year from 1978 to 2008. 
Overall
, there was a decline in the percentage of  
income
  gap
 in Japan, US, France and UK, while an opposite trend can be  
seen
 in the  
figure
 for difference  
income
 in Australia.  
In addition
, Australia was the  
only
 country had the  
income
  gap
 between  
men
 and women increased in five countries.
The share of the difference  
income
 in genders in Japan  
started
 at 48%, after which it experienced a significant decrease to about 41% in 2008.  
Similarly
, the  
figure
 for the  
income
  gap
 between  
men
 and women in US,  
Uk
 decreased from 33% and 29% in 1978 to approximately 28% and 27%  
respectively
.
18% was the proportion of  
income
  gap
 genders in Australia in 1978, with a subsequent  
fluctuatios
 and surpass the  
figure
 for France in 1998 and ending the period at 24%. By contrast, the  
figure
 for France dropped from 19% to 17% in three decades.