| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't Know / Don't Recall | 1600 |
6.9%
|
| 1946 | 3 |
0%
|
|
| 1947 | 1 |
0%
|
|
| 1950 | 1 |
0%
|
|
| 1952 | 5 |
0%
|
|
| 1953 | 1 |
0%
|
|
| 1954 | 3 |
0%
|
|
| 1955 | 1 |
0%
|
|
| 1957 | 2 |
0%
|
|
| 1959 | 2 |
0%
|
|
| 1960 | 13 |
0.1%
|
|
| 1961 | 1 |
0%
|
|
| 1962 | 5 |
0%
|
|
| 1963 | 1 |
0%
|
|
| 1964 | 2 |
0%
|
|
| 1965 | 4 |
0%
|
|
| 1967 | 1 |
0%
|
|
| 1968 | 4 |
0%
|
|
| 1969 | 10 |
0%
|
|
| 1970 | 8 |
0%
|
|
| 1971 | 5 |
0%
|
|
| 1972 | 14 |
0.1%
|
|
| 1973 | 8 |
0%
|
|
| 1974 | 6 |
0%
|
|
| 1975 | 8 |
0%
|
|
| 1976 | 8 |
0%
|
|
| 1977 | 8 |
0%
|
|
| 1978 | 8 |
0%
|
|
| 1979 | 8 |
0%
|
|
| 1980 | 41 |
0.2%
|
|
| 1981 | 13 |
0.1%
|
|
| 1982 | 13 |
0.1%
|
|
| 1983 | 10 |
0%
|
|
| 1984 | 15 |
0.1%
|
|
| 1985 | 26 |
0.1%
|
|
| 1986 | 18 |
0.1%
|
|
| 1987 | 22 |
0.1%
|
|
| 1988 | 20 |
0.1%
|
|
| 1989 | 32 |
0.1%
|
|
| 1990 | 79 |
0.3%
|
|
| 1991 | 20 |
0.1%
|
|
| 1992 | 35 |
0.2%
|
|
| 1993 | 16 |
0.1%
|
|
| 1994 | 41 |
0.2%
|
|
| 1995 | 42 |
0.2%
|
|
| 1996 | 60 |
0.3%
|
|
| 1997 | 46 |
0.2%
|
|
| 1998 | 47 |
0.2%
|
|
| 1999 | 77 |
0.3%
|
|
| 2000 | 162 |
0.7%
|
|
| 2001 | 59 |
0.3%
|
|
| 2002 | 62 |
0.3%
|
|
| 2003 | 79 |
0.3%
|
|
| 2004 | 94 |
0.4%
|
|
| 2005 | 104 |
0.4%
|
|
| 2006 | 65 |
0.3%
|
|
| 2007 | 81 |
0.3%
|
|
| 2008 | 130 |
0.6%
|
|
| 2009 | 150 |
0.6%
|
|
| 2010 | 194 |
0.8%
|
|
| 2011 | 131 |
0.6%
|
|
| 2012 | 144 |
0.6%
|
|
| 2013 | 176 |
0.8%
|
|
| 2014 | 324 |
1.4%
|
|
| 2015 | 374 |
1.6%
|
|
| 2016 | 415 |
1.8%
|
|
| 2017 | 559 |
2.4%
|
|
| 2018 | 1186 |
5.1%
|
|
| 2019 | 16430 |
70.4%
|
|
| Sysmiss | 146 |