Plot a suitable time series method and comment on the underlying pattern in the proportion of singles among residents aged 20 to 29 over 2001-2010 with the data set given below:

YEARS	RESIDENTS AGED 20-29 YEARS
	MALES			FEMALES			GRAND TOTAL
	SINGLE	OTHERS	SUB-TOTAL	SINGLE	OTHERS	SUB-TOTAL
2001	179,600	41,900	221,500	138,800	90,300	229,100	450,600
2002	181,700	36,000	217,700	146,200	79,600	225,800	443,500
2003	179,700	36,200	215,900	145,000	81,500	226,500	442,400
2004	189,900	32,900	222,800	150,900	76,000	226,900	449,700
2005	187,900	38,700	226,600	147,000	81,600	228,600	455,200
2006	192,700	31,200	223,900	158,400	72,300	230,700	454,600
2007	191,700	31,200	222,900	158,300	72,000	230,300	453,200
2008	195,500	31,700	227,200	160,700	69,000	229,700	456,900
2009	209,900	30,900	240,800	169,800	66,800	236,600	477,400
2010	216,000	35,000	251,000	181,100	71,700	252,800	503,800