1970's: It's time for the US to use the metric system 1980's: It's time for the US to use the metric system 1990's: It's time for the US to use the metric sys

1970's: It's time for the US to use the metric system 1980's: It's time for the US to use the metric system 1990's: It's time for the US to use the metric system 2000's: It's time for the US to use the metric system 2010's: OK, seriously guys, it's time for the US to use the metric system, this is getting ridiculous