Table schema:
CREATE TABLE table_12720275_1 (rank__csa_ VARCHAR, percent_change__1990_2000_ VARCHAR)

Question: What is the rank (csa) for the percentage change (1990-2000) was a034 +8.71%?
SQL: SELECT rank__csa_ FROM table_12720275_1 WHERE percent_change__1990_2000_ = "A034 +8.71%"