Shares of environment and labour taxes in total tax revenues from taxes and social contributions in the EU

PREFIX qb: <http://purl.org/linked-data/cube#> 
PREFIX sdmx-measure: <http://purl.org/linked-data/sdmx/2009/measure#> 
PREFIX sdmx-dimension: <http://purl.org/linked-data/sdmx/2009/dimension#> 
PREFIX sdmx-attribute: <http://purl.org/linked-data/sdmx/2009/attribute#> 
PREFIX skos: <http://www.w3.org/2004/02/skos/core#> 
PREFIX property: <http://rdfdata.eionet.europa.eu/eurostat/property#> 
PREFIX property: <http://rdfdata.eionet.europa.eu/eurostat/property#> 
PREFIX unit: <http://dd.eionet.europa.eu/vocabulary/eurostat/unit/>
PREFIX geo: <http://dd.eionet.europa.eu/vocabulary/eurostat/geo/> 
PREFIX tax: <http://dd.eionet.europa.eu/vocabulary/eurostat/tax/>

SELECT 
year(?date) as ?date
bif:either(?tax = tax:LAB, 'Labour', 'Environment') as ?taxLabel 
?obsValue
 
WHERE {{
    GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/tsdgo410.rdf.gz>  {{
      _:tsdgo410 sdmx-dimension:timePeriod ?date . 
      _:tsdgo410 property:tax ?tax . 
      _:tsdgo410 sdmx-dimension:refArea geo:EU28 . 
      _:tsdgo410 sdmx-attribute:unitMeasure unit:PC . 
      _:tsdgo410 sdmx-measure:obsValue ?obsValue 

    #gap filling
    } UNION {
      { SELECT xsd:date('2013-01-01') as ?date tax:LAB as ?tax 50.6 as ?obsValue {} }
    } UNION {
      { SELECT xsd:date('2014-01-01') as ?date tax:LAB as ?tax 50.3 as ?obsValue {} } 
    } UNION {
      { SELECT xsd:date('2015-01-01') as ?date tax:LAB as ?tax 49.7 as ?obsValue {} } 
    }}
}}