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| Year | Incidence | Gap ratio | Severity | Sen's gap |
|---|---|---|---|---|
| 1976 | 1.038220286 | 1.03948399 | 1.020127978 | 1.001217608 |
| 1977 | 1.039370003 | 1.143330355 | 1.194237873 | 1.100021405 |
| 1978 | 0.975011477 | 1.017570795 | 1.015409721 | 1.043651221 |
| 1979 | 1.006206871 | 1.042432415 | 1.062641071 | 1.036003281 |
| 1980 | 0.928651834 | 0.942744024 | 0.963180744 | 1.015175105 |
| 1981 | 0.928913024 | 0.9106299 | 0.900065186 | 0.980317086 |
| 1982 | 0.992921427 | 0.965902695 | 0.934928849 | 0.972788127 |
| 1983 | 1.123039772 | 1.097163907 | 1.042047475 | 0.97696022 |
| 1984 | 1.100767306 | 1.098416569 | 1.073243846 | 0.997864628 |
| 1985 | 1.039396443 | 0.985746483 | 0.934174992 | 0.948384854 |
| 1986 | 0.96879339 | 0.909101796 | 0.864647217 | 0.938386301 |
| 1987 | 0.951576475 | 0.896963194 | 0.823921209 | 0.942608018 |
| 1988 | 0.868021277 | 0.793255747 | 0.725613839 | 0.913865541 |
| 1989 | 0.815241645 | 0.735345895 | 0.671362751 | 0.901997379 |
| 1990 | 0.946766891 | 0.901966655 | 0.854585445 | 0.952681009 |
| 1991 | 1.055887474 | 1.014030768 | 0.949034841 | 0.960357946 |
| 1992 | 1.062994088 | 1.006442944 | 0.957194233 | 0.946800439 |
| 1993 | 1.146361806 | 1.062336082 | 0.9795217 | 0.926702588 |
| 1994 | 1.101795241 | 1.032336873 | 0.950387349 | 0.936959132 |
| 1995 | 1.172050575 | 1.091056284 | 1.000793767 | 0.93089471 |
| 1996 | 1.257024692 | 1.223016879 | 1.174238494 | 0.972945074 |
| 1997 | 1.22660005 | 1.207398128 | 1.179648525 | 0.984344489 |
| 1998 | 1.096979248 | 1.117675941 | 1.12012044 | 1.018866193 |
| 1999 | 1.041719913 | 1.053725531 | 1.080973096 | 1.011524972 |
| 2000 | 1 | 1 | 1 | 1 |
| 2001 | 0.897448429 | 0.901830131 | 0.895976622 | 1.004883285 |
| 2002 | 0.926474182 | 0.913963943 | 0.899448798 | 0.986495705 |
| 2003 | 0.932049709 | 0.913858557 | 0.896504321 | 0.980482702 |
| 2004 | 0.911038327 | 0.913966339 | 0.905209151 | 1.003213671 |
| 2005 | 0.866821084 | 0.895365631 | 0.898987615 | 1.032931311 |
| 2006 | 0.843672109 | 0.814907871 | 0.804844196 | 0.965906088 |
| 2007 | 0.734615622 | 0.721353449 | 0.725334469 | 0.983125386 |
| Source: Survey of Consumer Finance (1976 to 1995) and Survey of Labour and Income Dynamics (1996 to 2007), author’s calculation. | ||||