If we look at the table data, Type II battery has registered a continous decrement in sales from 2006 till 2011 and then it only incremened in 2012 and that too was far low than what it was in 2006.
So TypeII battery has least growth.
Comparing Type IV and Type V, Type IV sales data took decrement in sales figure 4 times
Type V battery has seen decrement only once, 2008->2009
So, Type IV battery has poorer sales than Type V battery
Now we need to compare Type V and Type I
Type I battery registered continuous growth from years 2006->2009 and then from 2009->2010 it took a dip by 15.Only 1 time it got decremented.
Type V battery registered growth from 2006-.>2008 and then from 2008->2009 it took a dip by 60.
So, Type I battery has more consistent growth than Type V battery.