Table: green party of canada
Question: What is the rate of change in the percentage of popular vote for the Green Party between 1988 and 2008?
Step 1 (Operation, Indexing): % of popular vote
Step 2 (Operation, Filter): election
Step 3 (Operation, Filter): election
Step 4 (Reasoning, Arithmetic): -, between 1988 and 2008
Answer: 6.44%