Yes, definitely. Not all their greenhouse gas emission reductions have been reached with the implementation of solar, but solar was part of the mix of increased energy efficiency, with more energy coming from biomass, wind, geothermal, and of course solar, both thermal and photovoltaic. It is quite clear.
They say that in Germany, for example, one square metre of installed solar panel equals 800 litres of oil per year. You can see that on solarbusiness.de; it's a very interesting site on which to have fun. It's a country that has less sun than we have. It's one of the reasons they have reached their targets in some cases.