A line graph where, x-axis is 'Years' ranging from 1960 to 2000 with an increment of 10 and y-axis is 'Cumulative Volume of Change (in cubic kilometer)' ranging from negative 6500 to 0. A line passes through points (1960 comma 0), (1970 comma negative 1000), (1980 comma negative 2000), (1990 comma negative 3300) and (2000 comma negative 5400).