Standard Deviation Naira To Dollar Rate (Start)

	A	B
1	year	exch_usd
2	1973	0.657894999
3	1974	0.616218881
4	1975	0.614665929
5	1976	0.631074088
6	1977	0.651380928
7	1978	0.64808814
8	1979	0.570613409
9	1980	0.544454729
10	1981	0.636902109
11	1982	0.670241287
12	1983	0.748559024
13	1984	0.808276754
14	1985	0.99960016
15	1986	3.316749585
16	1987	4.140786749
17	1988	5.353319058
18	1989	7.651109411
19	1990	9.00090009
20	1992	19.64636542
21	1993	21.88183807
22	1994	21.99736032
23	1995	21.88662727
24	1996	21.8861
25	1997	21.886
26	1998	21.886
27	1999	97.95
28	2000	109.55
29	2001	112.95
30	2002	126.4
31	2003	136.5
32	2004	132.35
33	2005	129
34	2006	128.27
35	2007	117.968
36	2008	132.5625
37	2009	149.581
38	2010	150.6617
39	2011	158.267
40	2012	155.27
41	2013	155.2
42	2014	155.25
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