CLDR-17298 Add parts per billion

Author: macchiati

common/main/en.xml

@@ -6886,6 +6886,11 @@ annotations.
 				<unitPattern count="one">{0} part per million</unitPattern>
 				<unitPattern count="other">{0} parts per million</unitPattern>
 			</unit>
+			<unit type="concentr-portion-per-1e9">
+				<displayName>parts per billion</displayName>
+				<unitPattern count="one">{0} part per billion</unitPattern>
+				<unitPattern count="other">{0} parts per billion</unitPattern>
+			</unit>
 			<unit type="concentr-percent">
 				<displayName>percent</displayName>
 				<unitPattern count="one">{0} percent</unitPattern>
@@ -7965,6 +7970,11 @@ annotations.
 				<unitPattern count="one">{0} ppm</unitPattern>
 				<unitPattern count="other">{0} ppm</unitPattern>
 			</unit>
+			<unit type="concentr-portion-per-1e9">
+				<displayName>parts/billion</displayName>
+				<unitPattern count="one">{0} ppb</unitPattern>
+				<unitPattern count="other">{0} ppb</unitPattern>
+			</unit>
 			<unit type="concentr-percent">
 				<displayName>percent</displayName>
 				<unitPattern count="one">{0}%</unitPattern>
@@ -9041,6 +9051,11 @@ annotations.
 				<unitPattern count="one">{0}ppm</unitPattern>
 				<unitPattern count="other">{0}ppm</unitPattern>
 			</unit>
+			<unit type="concentr-portion-per-1e9">
+				<displayName>ppb</displayName>
+				<unitPattern count="one">{0}ppb</unitPattern>
+				<unitPattern count="other">{0}ppb</unitPattern>
+			</unit>
 			<unit type="concentr-percent">
 				<displayName>%</displayName>
 				<unitPattern count="one">{0}%</unitPattern>

common/main/root.xml

@@ -5101,6 +5101,10 @@ Warnings: All cp values have U+FE0F characters removed. See /annotationsDerived/
 				<displayName>ppm</displayName>
 				<unitPattern count="other">{0} ppm</unitPattern>
 			</unit>
+			<unit type="concentr-portion-per-1e9">
+				<displayName>ppb</displayName>
+				<unitPattern count="other">{0} ppb</unitPattern>
+			</unit>
 			<unit type="concentr-percent">
 				<displayName>%</displayName>
 				<unitPattern count="other">{0}%</unitPattern>