Scandinavian family name etymology

Columns: Rank | Surname | Number of bearers 1971 | Number of bearers 2012 | Type | Etymology
1 | Jensen | 368,631 | 264,824 | patronymic | son of Jens | 2 | Nielsen | 349,126 | 264,159 | patronymic | son of Niels | 3 | Hansen | 297,937 | 220,956 | patronymic | son of Hans | 4 | Pedersen | 203,426 | 166,417 | patronymic | son of Peder | 5 | Andersen | 188,359 | 161,379 | patronymic | son of Anders | 6 | Christensen | 159,943 | 121,147 | patronymic | son of Christen | 7 | Larsen | 148,214 | 118,144 | patronymic | son of Lars

Example questions:
What is the alternate spelling of the Scandinavian last name possessed by 121,147 in 2012 ? | What is the share of Danish people who have the Scandinavian last name possessed by 118,144 in 2012 ? | Which father is referenced by the Scandinavian last name possessed by 161,379 in 2012 ? | What portion of Danish have the Scandinavian last name possessed by 220,956 in 2012 ? | What is the popularity rank of the Scandinavian last name possessed by 166,417 in 2012 ?

Answers:
Kristensen | 2.4% | Anders | 4.3% | sixth