Resource productivity (GDP/DMC)

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 indic_nv: <http://dd.eionet.europa.eu/vocabulary/eurostat/indic_nv/>
PREFIX unit: <http://dd.eionet.europa.eu/vocabulary/eurostat/unit/>
PREFIX geo: <http://dd.eionet.europa.eu/vocabulary/eurostat/geo/>
PREFIX common_countries: <http://dd.eionet.europa.eu/vocabulary/common/countries/>

SELECT 
bif:either(?geo = geo:DE, 'Germany', ?ugeo) as ?country
year(?date) as ?date
?tsdpc100
round((?tsdpc100/?tsdpc100_idx)*1000)/10.0 as ?index

WHERE {
{  
  GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/tsdpc100.rdf.gz> 
  {
    _:tsdpc100 sdmx-dimension:refArea ?geo .
    _:tsdpc100 sdmx-dimension:timePeriod ?date .
    _:tsdpc100 sdmx-attribute:unitMeasure unit:EUR_KG_CLV10 .
    _:tsdpc100 sdmx-measure:obsValue ?tsdpc100  .

    _:tsdpc100_idx sdmx-dimension:refArea ?geo .
    _:tsdpc100_idx sdmx-dimension:timePeriod ?date_idx .
    _:tsdpc100_idx sdmx-attribute:unitMeasure unit:EUR_KG_CLV10 .
    _:tsdpc100_idx sdmx-measure:obsValue ?tsdpc100_idx  .
    FILTER (year(?date_idx) = 2000)

  } 
  ?geo rdfs:label ?ugeo .
 }
}
GROUP BY ?country
ORDER BY ?country ?date