Waste generation and decoupling - gdp

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 property: <http://rdfdata.eionet.europa.eu/eurostat/property#> 
PREFIX rdf-schema: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX geo: <http://dd.eionet.europa.eu/vocabulary/eurostat/geo/> 
PREFIX unit: <http://dd.eionet.europa.eu/vocabulary/eurostat/unit/> 
PREFIX hazard: <http://dd.eionet.europa.eu/vocabulary/eurostat/hazard/>
PREFIX waste: <http://dd.eionet.europa.eu/vocabulary/eurostat/waste/>
PREFIX nace_r2: <http://dd.eionet.europa.eu/vocabulary/eurostat/nace_r2/>
PREFIX indic_de: <http://dd.eionet.europa.eu/vocabulary/eurostat/indic_de/> 
PREFIX na_item: <http://dd.eionet.europa.eu/vocabulary/eurostat/na_item/>

SELECT DISTINCT

year(?date) as ?date
?ugeo
'Gross Domestic Product' as ?label
round((sum(?obsValue)/sum(?obsValue_idx))*1000)/10.0 as ?index
  {{
    GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/nama_10_gdp.rdf.gz> 
      {
        _:nama_10_gdp sdmx-dimension:timePeriod ?date .
        _:nama_10_gdp property:na_item na_item:B1G .
        _:nama_10_gdp sdmx-dimension:refArea ?geo .
        _:nama_10_gdp sdmx-attribute:unitMeasure ?unit .
        _:nama_10_gdp sdmx-measure:obsValue ?obsValue .

        _:nama_10_gdp_idx sdmx-dimension:timePeriod ?date_idx .
        FILTER (year(?date_idx) = 2010)
        _:nama_10_gdp_idx property:na_item na_item:B1G .
        _:nama_10_gdp_idx sdmx-dimension:refArea ?geo .
        _:nama_10_gdp_idx sdmx-attribute:unitMeasure ?unit .
        _:nama_10_gdp_idx sdmx-measure:obsValue ?obsValue_idx .

        FILTER (?unit = unit:CLV10_MEUR)

      }
  }
  ?unit rdfs:label ?label .
  FILTER (year(?date) >= 2010)
  ?geo rdfs:label ?ugeo .
  FILTER (?geo = geo:EU28)
}
ORDER BY ?date