Data not available for olig on 09/21/2016.
Data available for olig
199008 199009 199010 199011 199012
199101 199102 199103 199104 199105
199106 199107 199108 199109 199110
199111 199112 199201 199202 199203
199204 199205 199206 199207 199208
199209 199210 199211 199212 199301
199302 199303 199304 199305 199306
199307 199308 199309 199310 199311
199312 199401 199402 199403 199404
199405 199406 199407 199408 199409
199410 199411 199412 199501 199502
199503 199504 199505 199506 199507
199508 199509 199510 199511 199512
199601 199602 199603 199604 199605
199606 199607 199608 199609 199610
199611 199612 199701 199702 199703
199704