As of the census of 2010, there were 161,129 people, 62,694 households, and 39,989 families residing in the county. The population density was 233 people per square mile (90/km²). There were 69,120 housing units at an average density of 109 per square mile (39/km²). The racial makeup of the county was 88.73% Race (United States Census), 7.14% Race (United States Census) or Race (United States Census), 0.23% Race (United States Census), 1.71% Race (United States Census), 0.02% Race (United States Census), 0.89% from Race (United States Census), and 1.34% from two or more races. 5.01% of the population were Race (United States Census) or Race (United States Census) of any race. 22.3% were of Irish people, 14.7% Italian people, 12.8% Germans, 7.5% English people, 6.2% French people, 5.3% United States and 2.3% Puerto Rican People ancestry according to 2010 United States Census. 95.4% spoke English language and 2.7% Spanish language as their first language.

Answer this question based on the article: How many people, in terms of percentage of the population, did not speak English as their first language?
4.6