"Year","After 1 year","After 3 years","After 5 years"
1978,74.35449,65.34487,60.9392
1979,76.87004,65.63662,61.91106
1980,77.19735,67.9508,64.83172
1981,75.61576,66.99609,62.23087
1982,75.77778,68.45547,62.46492
1983,78.31132,68.7486,63.87146
1984,78.25503,68.23252,64.11058
1985,75.29433,68.09829,63.90682
1986,72.83706,66.29912,64.28089
1987,74.33221,68.44488,64.93336
1988,74.93137,68.54639,63.67476
1989,75.37747,69.07424,65.03652
1990,77.03789,68.53729,65.71658
1991,77.57467,70.9782,65.59872
1992,78.07304,71.83533,66.33226
1993,77.7902,70.61636,64.45058
1994,78.5491,70.59026,63.67678
1995,78.06315,68.18029,62.33766
1996,77.20923,67.73929,62.84755
1997,76.29074,66.77944,63.4986
1998,74.37271,65.80073,61.61762
1999,73.96442,65.5714,60.88561
2000,72.111,63.64644,NA
2001,74.11387,65.63371,NA
2002,76.35854,NA,NA
2003,77.05494,NA,NA