The first album of the series was published in 1970.

When their first album was published in 2007, the boys were only 15-16 years old.

His last album with new material was published in 2000.

In total around 125 different albums were published between 1914 and 1955.

At the end the album was published on October 30, 2009.

The 1st album of 1976 "1976-1" was published by themselves in 1999.

She also announced that an album might be published the following year.

Since then, a new album per year of the character has been published, except in 2012.

The first album was published in January, the third this month.

However, only six albums of the planned 42 were ever published.