Change in final electricity consumption, averaged annual growth rate per country

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
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 geo: <http://dd.eionet.europa.eu/vocabulary/eurostat/geo/>
PREFIX unit: <http://dd.eionet.europa.eu/vocabulary/eurostat/unit/>
PREFIX product: <http://dd.eionet.europa.eu/vocabulary/eurostat/product/>
PREFIX indic_nrg: <http://dd.eionet.europa.eu/vocabulary/eurostat/indic_nrg/>

SELECT DISTINCT
year(?date2) as ?date
bif:either(?geo = geo:DE, 'Germany', ?ugeo) as ?ugeo
round((bif:power( sum(?energy_last) / sum(?energy_first),(1.0/( year(?date2) - 2005 ))) -1)*1000)/10.0 as ?renweable_energies 

WHERE {
{  
  GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/nrg_100a.rdf.gz> 
  { 
    _:nrg_100a sdmx-attribute:unitMeasure unit:KTOE .
    _:nrg_100a sdmx-dimension:refArea ?geo .
    _:nrg_100a property:product product:6000 .
    _:nrg_100a property:indic_nrg indic_nrg:B_101700 .
    _:nrg_100a sdmx-dimension:timePeriod ?date2 .
    FILTER (year(?date2) > 2005)
    _:nrg_100a sdmx-measure:obsValue ?energy_last .

    _:nrg_100a_idx sdmx-attribute:unitMeasure unit:KTOE .
    _:nrg_100a_idx sdmx-dimension:refArea ?geo .
    _:nrg_100a_idx property:product product:6000 .
    _:nrg_100a_idx property:indic_nrg indic_nrg:B_101700 .
    _:nrg_100a_idx sdmx-dimension:timePeriod ?date_idx .
    FILTER (year(?date_idx) = 2005)  
    _:nrg_100a_idx sdmx-measure:obsValue ?energy_first .
  }
 ?geo rdfs:label ?ugeo .
 }
}
GROUP BY ?date2 ?ugeo ?geo
HAVING sum(?energy_first) > 0.0
ORDER BY ?ugeo ?date2