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class AutomobileYear < ActiveRecord::Base
self.primary_key = "year"
# Estimate of % of vehicles currently in use that were manufactured in each year
# Derived from 2012 EPA GHG inventory appendix tables A-91, A-92, and A-95
# Used by AutomobileMakeModelYear and AutomobileMakeYear to get weighting so other classes can derive weighted fuel efficiency
def self.weighting(year)
{
2012 => 0.0607,
2011 => 0.0491,
2010 => 0.0560,
2009 => 0.0669,
2008 => 0.0677,
2007 => 0.0668,
2006 => 0.0641,
2005 => 0.0620,
2004 => 0.0624,
2003 => 0.0625,
2002 => 0.0610,
2001 => 0.0546,
2000 => 0.0467,
1999 => 0.0410,
1998 => 0.0347,
1997 => 0.0289,
1996 => 0.0244,
1995 => 0.0189,
1994 => 0.0139,
1993 => 0.0112,
1992 => 0.0094,
1991 => 0.0084,
1990 => 0.0066,
1989 => 0.0056,
1988 => 0.0047,
1987 => 0.0037,
1986 => 0.0025,
1985 => 0.0054
}[year]
end
col :year, :type => :integer
warn_unless_size 28
end
Version data entries
5 entries across 5 versions & 1 rubygems