| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't Know / Don't Recall | 1171 |
3.9%
|
| 1952 | 2 |
0%
|
|
| 1954 | 1 |
0%
|
|
| 1955 | 1 |
0%
|
|
| 1956 | 4 |
0%
|
|
| 1957 | 3 |
0%
|
|
| 1958 | 1 |
0%
|
|
| 1959 | 3 |
0%
|
|
| 1960 | 16 |
0.1%
|
|
| 1961 | 2 |
0%
|
|
| 1962 | 5 |
0%
|
|
| 1963 | 4 |
0%
|
|
| 1964 | 3 |
0%
|
|
| 1965 | 8 |
0%
|
|
| 1967 | 4 |
0%
|
|
| 1968 | 4 |
0%
|
|
| 1969 | 13 |
0%
|
|
| 1970 | 22 |
0.1%
|
|
| 1971 | 4 |
0%
|
|
| 1972 | 15 |
0%
|
|
| 1973 | 9 |
0%
|
|
| 1974 | 11 |
0%
|
|
| 1975 | 4 |
0%
|
|
| 1976 | 6 |
0%
|
|
| 1977 | 9 |
0%
|
|
| 1978 | 14 |
0%
|
|
| 1979 | 12 |
0%
|
|
| 1980 | 41 |
0.1%
|
|
| 1981 | 14 |
0%
|
|
| 1982 | 12 |
0%
|
|
| 1983 | 17 |
0.1%
|
|
| 1984 | 23 |
0.1%
|
|
| 1985 | 32 |
0.1%
|
|
| 1986 | 38 |
0.1%
|
|
| 1987 | 15 |
0%
|
|
| 1988 | 27 |
0.1%
|
|
| 1989 | 32 |
0.1%
|
|
| 1990 | 68 |
0.2%
|
|
| 1991 | 21 |
0.1%
|
|
| 1992 | 28 |
0.1%
|
|
| 1993 | 23 |
0.1%
|
|
| 1994 | 38 |
0.1%
|
|
| 1995 | 50 |
0.2%
|
|
| 1996 | 66 |
0.2%
|
|
| 1997 | 48 |
0.2%
|
|
| 1998 | 68 |
0.2%
|
|
| 1999 | 87 |
0.3%
|
|
| 2000 | 160 |
0.5%
|
|
| 2001 | 51 |
0.2%
|
|
| 2002 | 68 |
0.2%
|
|
| 2003 | 78 |
0.3%
|
|
| 2004 | 117 |
0.4%
|
|
| 2005 | 108 |
0.4%
|
|
| 2006 | 74 |
0.2%
|
|
| 2007 | 107 |
0.4%
|
|
| 2008 | 151 |
0.5%
|
|
| 2009 | 174 |
0.6%
|
|
| 2010 | 166 |
0.5%
|
|
| 2011 | 135 |
0.4%
|
|
| 2012 | 153 |
0.5%
|
|
| 2013 | 213 |
0.7%
|
|
| 2014 | 301 |
1%
|
|
| 2015 | 375 |
1.2%
|
|
| 2016 | 414 |
1.4%
|
|
| 2017 | 646 |
2.1%
|
|
| 2018 | 2112 |
7%
|
|
| 2019 | 22528 |
74.5%
|