diff --git a/schema/national_exports.xml b/schema/national_exports.xml
index 0099db9..7735a0b 100644
--- a/schema/national_exports.xml
+++ b/schema/national_exports.xml
@@ -2,7 +2,7 @@
     <Cube name="National Exports">
     
         <Table name="national_exports"/>
-        <Dimension foreign_key="year" name="Year">
+        <Dimension foreign_key="year" name="Year" type="time">
             <Hierarchy name="Year">
                 <Level name="Year" key_column="year" key_type="i16"/>
             </Hierarchy>
@@ -38,4 +38,4 @@
         
         <Measure name="Trade Values" key_column="trade_value" aggregator="sum" />
     </Cube>
-</Schema>
\ No newline at end of file
+</Schema>