There is one saying in financial world that

"Before doing investment one should know it's past so that one can estimate it's future" .

Same thing applies to PPF too. Before we do investment in PPF, we must have brief knowledge of it current rate of interest and how in the past it's rate of interest have changed. PPF scheme was started by government of india in 1968 with rate of interest being 4.8%. PPF rates have seen many up and downs such as in 1999-2000 it's rates are sky high 12%, while in beginning it was just 4.8%. 

Below table provides all interest rate history starting from 1968 to present 2016.


Year Rate of Interest
1968-69 4.8%
1969-70 4.8%
1970-71 5%
1971-72 5%
1972-73 5%
1973-74 5.3%
From 1.4.1974 to 31.7.1974 5.8%
From 1.8.1974 to 31.3.1975 7%
1975-76 7%
1976-77 7%
1977-78 7.5%
1978-79 7.5%
1979-80 7.5%
1980-81 8%
1981-82 8.5%
1982-83 8.5%
1983-84 9%
1984-85 9.5%
1985-86 10%
From 1.4.1986 to 31.3.1999 12%
From 1.4.1999 to 14.1.2000 12%
From 15.1.2000 to 28.2.2001 11%
From 1.3.2001 to 28.2.2002 9.5%
From 1.3.2002 to 28.2.2003 9%
From 1.3.2003 to 30.11.2011 8%
From 1.12.2011 to 31.3.2012 8.6%
From 1.4.2012 to 31.3.2013 8.8%
From 1.4.2013 to 31.3.2016 8.7%
From 1.4.2016 onwards 8.1%

Hope this formatted data regarding ppf interest rate helps you. Thanks.