Gas component in average annual growth rates for different fuels

PREFIX sdmx-measure: <http://purl.org/linked-data/sdmx/2009/measure#> 
PREFIX sdmx-dimension: <http://purl.org/linked-data/sdmx/2009/dimension#> 
PREFIX skos: <http://www.w3.org/2004/02/skos/core#> 
PREFIX property: <http://rdfdata.eionet.europa.eu/eurostat/property#> 
PREFIX g: <http://rdfdata.eionet.europa.eu/eurostat/dic/geo#>
PREFIX u: <http://rdfdata.eionet.europa.eu/eurostat/dic/unit#>
PREFIX p: <http://rdfdata.eionet.europa.eu/eurostat/dic/product#>
PREFIX indic_nrg: <http://rdfdata.eionet.europa.eu/eurostat/dic/indic_nrg#>

SELECT
'Gas' as ?label

round(((bif:power((sum(?gas_2011)/sum(?gas_2005)),(1/6.0)))-1)*10000)/100.0 as ?2005_2011
round((((sum(?gas_2011)/sum(?gas_2010)))-1)*10000)/100.0 as ?2010_2011
round((((sum(?gas_2010)/sum(?gas_2009)))-1)*10000)/100.0 as ?2009_2010
round((((sum(?gas_2009)/sum(?gas_2008)))-1)*10000)/100.0 as ?2008_2009
round(((bif:power((sum(?gas_2011)/sum(?gas_1990)),(1/21.0)))-1)*10000)/100.0 as ?1990_2011

{{

SELECT
year(?date) as ?date
bif:either (year(?date) = 1990, sum(?nrg_103a), 0) as ?gas_1990
bif:either (year(?date) = 2005, sum(?nrg_103a), 0) as ?gas_2005
bif:either (year(?date) = 2008, sum(?nrg_103a), 0) as ?gas_2008
bif:either (year(?date) = 2009, sum(?nrg_103a), 0) as ?gas_2009
bif:either (year(?date) = 2010, sum(?nrg_103a), 0) as ?gas_2010
bif:either (year(?date) = 2011, sum(?nrg_103a), 0) as ?gas_2011

WHERE {
  {  
    GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/nrg_103a.rdf.gz> 
    {
    _:nrg_103a property:geo g:EU28 .
    _:nrg_103a property:unit u:1000TOE .
    _:nrg_103a sdmx-dimension:timePeriod ?date .
    _:nrg_103a property:product p:4000 .
    _:nrg_103a property:indic_nrg <http://dd.eionet.europa.eu/vocabulary/eurostat/indic_nrg/B_100900> .
    _:nrg_103a sdmx-measure:obsValue ?nrg_103a .
    }
  }
}

}}