_id	annee	ensemble
1	1950	1822.77
2	1951	1857.67
3	1952	1838.72
4	1953	1825.26
5	1954	1844.34
6	1955	1843.85
7	1956	1816.36
8	1957	1809.39
9	1958	1803.12
10	1959	1806.99
11	1960	1825.87
12	1961	1817.07
13	1962	1836.03
14	1963	1831.05
15	1964	1846.64
16	1965	1841.76
17	1966	1842.8
18	1967	1818.42
19	1968	1797.9
20	1969	1747.69
21	1970	1739.13
22	1971	1743.24
23	1972	1703.95
24	1973	1696.33
25	1974	1673.46
26	1975	1652.98
27	1976	1682.03
28	1977	1651.42
29	1978	1625.39
30	1979	1625.37
31	1980	1620.71
32	1981	1604.18
33	1982	1532.59
34	1983	1516.31
35	1984	1510.7
36	1985	1484.89
37	1986	1483.31
38	1987	1497.27
39	1988	1507.92
40	1989	1496.52
41	1990	1497.95
42	1991	1487.78
43	1992	1490.74
44	1993	1484.55
45	1994	1483.82
46	1995	1466.22
47	1996	1462.83
48	1997	1459.72
49	1998	1452.09
50	1999	1450.48
51	2000	1430.4
52	2001	1415.18
53	2002	1386.79
54	2003	1390.77
55	2004	1413.57
56	2005	1416.17
57	2006	1400.44
58	2007	1424.12
59	2008	1432.55
60	2009	1418.94
61	2010	1427.67
62	2011	1434.51
63	2012	1429.16
64	2013	1417.05
65	2014	1411.78
66	2015	1412.33
67	2016	1420.1
68	2017	1419.64