_id freq   unit   vehicle   geo\TIME_PERIOD   1970   1971   1972   1973   1974   1975   1976   1977   1978   1979   1980   1981   1982   1983   1984   1985   1986   1987   1988   1989   1990   1991   1992   1993   1994   1995   1996   1997   1998   1999   2000   2001   2002   2003   2004   2005   2006   2007   2008   2009   2010   2011   2012   colspacer
freq unit vehicle geo_time_period unsafe_1970 unsafe_1971 unsafe_1972 unsafe_1973 unsafe_1974 unsafe_1975 unsafe_1976 unsafe_1977 unsafe_1978 unsafe_1979 unsafe_1980 unsafe_1981 unsafe_1982 unsafe_1983 unsafe_1984 unsafe_1985 unsafe_1986 unsafe_1987 unsafe_1988 unsafe_1989 unsafe_1990 unsafe_1991 unsafe_1992 unsafe_1993 unsafe_1994 unsafe_1995 unsafe_1996 unsafe_1997 unsafe_1998 unsafe_1999 unsafe_2000 unsafe_2001 unsafe_2002 unsafe_2003 unsafe_2004 unsafe_2005 unsafe_2006 unsafe_2007 unsafe_2008 unsafe_2009 unsafe_2010 unsafe_2011 unsafe_2012