• Average age of women having first child: 21 in 1970; 25 in 2006
• Babies born to women 40 or older: 2,000 a year in Minnesota; more than 100,000 a year in United States
• U.S. births registered in 2007: 4.3 million
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A man impersonating a police officer shot and killed Minnesota state legislator Melissa Hortman and her husband at their home in what Gov. Tim Walz called ''targeted political violence.''
