Originally, an average episode used to consist of around 50 percent of American material, like most international co-productions of Sesame Street. From 2007 onwards, the American material has been used less often, so that eventually, an average "Sesamstraße" episode contains nomore than one or two American-produced sketches. In addition, much as on "Sesame Street" since 2002, "Sesamstraße"'s street scenes began to feature mostly at the beginning of each episode. Since 2008, the show has been shot in high definition. On 24 December 2008, a German-produced, 45-minute Christmas special called "Weihnachten mit Ernie und Bert" aired, featuring Ernie, Bert, and an Anything Muppet Santa Claus. In 2011, more segments were produced to air both as standalone segments outside the show, and within: "Ernie & Bert Songs" and "Ernie & Bert Märchensongs". From 2010 to 2012, the street stories were all repeats from previous episodes, although other new content was still being produced.